GMC Sierra: Stuck On Defrost
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- เผยแพร่เมื่อ 2 ต.ค. 2024
- In this video I have a look at an older GMC Sierra that had a customer complaint of the HVAC being stuck on defrost. My gut told me "prolly just a bad actuator." However, the data showed us something different.
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Guess I failed to mention in the video that customer had all ready purchased a new OEM actuator. Just to be sure I wasn't crazy I tried it but knew it wasn't gonna work from our test results. He told me to just leave it in because he already bought it. 🤷♂️
Now that’s what you call a Vehicle Air Conditioning System Crash.
Had a focus that a blend door seal was all so the problem after it was warm stick like glue 🤣
Hack Mechanic my arse. You are the Sherlock Homes of the Auto World
I’d lay down a $400 bet that the owner will not want to tear into the heater box. I know I wouldn’t. 😂
27:04 MFG March 30 2020
Do customers appreciate what an amazing mechanic you are? I can't imagine most people figuring this one out without a huge bill for parts not needed. You're awesome.
Every once in a while I find a channel that I like so much I start binge watching it’s old videos. Yours is one of those. You mix education, practicality and a dry sense of humor to make a very entertaining product. Thanks for what you do.
That is only in the first 50 videos LOL
i was doing just that today... cued up the CHEVROLET list & let 'em play. Made it through 30 of 'em.
Yeah, he's absolutely the best!
Yep. Me too. My kids are sick of it. 😆
The first thing I noticed was what looked like "popcorn" under the dash and on top of the dash. Who would have "thunk it" that was the root of the problem. Great Video Eric.
"You can't go to war until you know what you're fighting!"
Every married man knows that!
Yes and worst food for a man to eat...... is wedding cake.
I remember when it was cable operated and never went bad. slide the lever left for floor, middle for vents ,right for defrost.
I remember when gas was 23 cents a gallon. What's you're point...?
@@buckhorncortez And I remember when people were courteous to each other...
@@john7017 best reply to a troll,well spoken sir
@@buckhorncortez what's yours ..?
I had a cable break but it was a easy fix. Even the old vacuum driven systems were easy to fix if it's not working more then likely a vac leak cause the vacuum systems themselves rarely failed. If they did it was they sat for too long and we're stuck easy fix.
Very interesting! I had the opposite happen with an old GMC truck. The blend door had warped and would never reach the full 5V position. If you put it at full hot it would continuously fight the warped door and eventually burned out the actuator motor. I also gave the customer two options: Tear apart the dash and heater box to replace the blend door, or take a small file and turn the squarish drive slot in the actuator into more of an hour glass shape. You can guess which option they chose!
WOW I got the same problem it doesn't reach five !
That's great to know! I'd never thought of that or seen it!
Figuring out that the arm was traveling too far from the remnants of foam laying around proves you’re a genius!
Not a hack job by any stretch IMO, I call it re-engineering to save the customer money and time without the vehicle. I wish I could do that sometimes. I can’t as a warranty only technician.
My thoughts exactly! This is by no means a hack job. It’s a simple long lasting solution to a very expensive repair.
Michael Shafer- What does a warranty only technician do for money? How do you live without money? Auto manufactures sure as hell ain’t going to pay even minimum wage to fix their cars.
I am amazed at your logical diagnostic process. I was a service manager at a GM dealer for 13 years and I doubt any of my techs would have found this without just replacing all the external parts. Well done sir!
Her: "he must be thinking of other girls."
Him: "how do I fix that damn truck?"
Hi Eric O. Lots TH-cam are saying that need power reset by taking fuse out.
If it is not that 'Damn Truck', it has to be 'Where's the nearest ice cream?'
@@kawasas not this style. I double checked. It's the latter models.
@@SouthMainAuto Yeah the old battery cable or fuse pull to perform a reset or relearn on these usually only temporary they will do it again and again until you fix what it’s fussing about.
Had a similar problem. Took actuator apart and moved internals so door bottoms before the potentiometer tops out. “Manually calibrated”
Foam missing, time for a colonoscopy!
Just shows electronc theory knowledge is necessary , but so is theory of mechanical functions ! Good job !
Ye, being able to read schematics and have a basic understanding of circuits is a minimum today. Not much is required beyond that though because if electronic breaks, you can only replace it as a whole. I doubt that Eric would go into soldering broken resistors and capacitors simply because of warranty.
Ar first I thought this video was ridiculously long for the topic, but you went into detail on stuff I haven't even seen brought up in many other videos. I'm working on a Cadillac ATS but your explanation helped me figure out that I had over clocked the actuator when trying to like it up and cause my problem. Thank you so much for the time and effort you put into this!
the old cable controlled system was a lot less headache. another good video, tnx
I've been searching & searching for many possible scenarios... I am glad that I stumbled across your channel. Your attention to detail & clear explanations, have helped me identify different options for solutions to the same issue I'm having.
Many thank yous
Man I was just thinking, "It would be nice to have a new SMA video tonight."
Strange... I wasn't.
You're right.
Yeah, Ivan has two videos before Eric. Must be the NY snow.
I was thinking it's time to sleep or I'll be exhausted tomorrow. Fuck
Guess what? Your girlfriend was not thinking the same thing LOL
This is the best description repair out there for this issue I’ve had several vehicles come in my shop with this issue and this video has saved me several times.
Ouch - I certainly wouldn't have suspected the loss of the sealing foam would lead to the mechanism not working. Good lesson for sure
Above and WAY beyond. I would like to extend my appreciation to the depth of effort and expertise you apply to these difficult diagnosis.
Just got into bed here in UK and an SMA video comes live. Ah, perfect timing.
Cheers mate
Need to move over to USA like I did lol!
You know that sounded KINKY!!!
@@rons4452 Upon reflection I could have worded that better! 🤔
@@LFBsmokealarm Ha Ha Ha Too funny!!!!
Eric,
I have this trucks 1/2 brother from another motha. Within 1000 miles and its an 02. Gives me something definite to look for. Only difference is I've never seen any of the foam anywhere. Here I go, but at least I'm armed with a boat load of wisdom from Eric O. Thanks a ton, Ron
working on southern vehicles is always a treat!
Might not need to defrost the window, but the foam (if that's what it is, don't know unless you rip it apart) isn't going to be a climate thing, it's going to be a age thing.
West... west are the best! haha
Southwestern vehicles all have extremely brittle plastic pieces and rubber parts. Gotta be extra careful to not break stuff.
@@dlewis9760 the heat and dry air dose kill plastic parts even here in Missouri the summer heat murders dashes and interior bits. But in the north east the salt eats the cars so it's a give and take
My truck-no rust, no plastic (lives in Arizona). All my plastic is so brittle that a good bump will send pieces of the dash to the floor.
I had a two part problem as the actuator had a split plastic gear inside and would do nothing. I replaced it but low and behold it would stick in defrost after going through the motions. I watch all the time and searched your videos and came across this one. Guess what? That awesome screw mod worked wonders! Good enough for me seeing it's an 2003 gmc. Funny thing, I've never had to do anything to our tacoma or tundra. 😀 Thanks for all you do from being a great service to your community and bringing us these very helpful video's. I didn't even use my big fancy scan tool! 😜
I just knew you were going to go full 'Ivan' on this!!! Nice job, way to go!
Who is Ivan ??
@@rons4452 garage 51 I believe is the TH-cam channel it's a Russian mechanic that dose all kinds of stuff to old shitboxes mostly for entertainment
@@rons4452 Ivan of Pine Hollow Diagnostics ... A young man yes of Russian heritage, but a genius in diagnostics and repair ... He often will take something that is broken and take it apart and figure out how to fix it.... Sometimes his repairs are a bit out of the box, like this one from Eric at SMA. Check out his channel... You won't be disappointed
You are a true sleuth. What impressed me the most is when you said I thought about it last night. Excellent
Ooooh! I know this solution even before you start. Wish you woulda made it before it took me 3 hours to figure it out. Fun fact!! The part numbers between the mode, blend, and third door (or auto air trucks) actuators are interchangeable, as in they fit and plug in perfectly, but are NOT the same part. It will cause it to act strangely. In my case, the mode door will act backwards. (Air on defroster when on vents, vise versa) Also. When diagnosing do not plug the new actuators in when not installed to “test.” They will work, but can move farther than they’re supposed to when installed and they will ruin themselves.
I know all of this because I personally did all of this a few times.
So what did you do. I have the same problem as you did
@@jackfentress0281 edit: wrong reply
If you’re having them work backwards you have the wrong acuator in the wrong place. The blend door will not work in the mode door spot, even though the look exactly the same and plug in. If you over extended the actuator you can try to get it back with a 9V battery, but normally they are ruined. Good luck.
@@ColdStartAuto how do you move with 9v battery?
@@132isaac you use two wires coming off the 9v, and touch them to the posts on the actuator to get it to move side to side. If you locked it all the way to one side it’s already toast tho
@@ColdStartAuto on my 2002 I replaced with a doorman. I hooked it up prior to install. It moved quite a bit. Then read ur supposed to put them in first before powering. So I took cover off and lifted the one gear up and then repositioned the marks like they were before and put Gear back down and cover back on and installed it. Worked great for a few times then quit. Could it be doorman are trash lol?
You are one sharp diagnostician. Rotted foam on the blend doors. Amazing!
in 2016 when I worked at a Chrysler dealership we had a service bulletin to re-flash the BCM in many Jeeps because the foam that sealed the blend door to the box would get smushed and collapse over time causing the actuators to go past a programmed "limit". The flash just increased the voltage limit the computer would allow as acceptable.
Some Fords have similar issues; Dorman makes a blend door repair kit that doesn't require removing the whole dash to fix the failed foam issue.
I can't believe GM and Chrysler engineers never considered that this could happen and program some sort of fail-safe other than "stop working entirely."
Actually yes I can believe it.
@@notsureigaf Or design it right and eliminate the failure point entirely.
@@markh.6687 That kind of thinking is what brings on failures like this in the first place. You should always have a backup plan or fail-safe even if you're sure you designed something right, so that if you end up being wrong about your design, at least some poor schmuck doesn't have their HVAC stuck on defrost.
This is very insteresting, I always wondered why some models of Jeeps always had blend doors breaking. I guess they go past their limit like you mentioned, and break the door or shaft. I've even seen a Jeep with a upgraded aluminum all blend door snap the door right off the shaft.
Just awesome advice. I was ready to buy the usual replacement parts. I see foam so I’m going to try wonky first! I always appreciate you garage engineers.
"Back in the day"...when the "HVAC" system position was controlled mechanically by a sliding lever and a wire, these problems were few and far between. Thank God for progress (he types with a whole lot of sarcasm)!
@John Stone Rookie hell! I'm 52 years old and have been working on everything from lawn mowers to semi tractors since I was 8. I'm calling bs on you!
@John Stone troll
@John Stone You have a right to voice you're opinion and I'll always support that right...even when your opinion is wrong! Have a good night.
Back in the day there was no youtube So who was or is better off ?????
Guess the days of cracking a wing are gone too..
Thanks for such great insight into tracking down a problem and finding a solution that won't break a person's bank
Nice find Eric O interesting the foam being blown out caused it to hyper extend and the potentiometer didn't like it nice repair with a screw @SouthMainAutoRepairLLC
Very interesting approach to solving the riddle! I have a 2004 Silverado that had the same issue - defrost only. Bought it used, did not know the history of the vehicle. Paid the diagnostics fee at the dealership, yup, that's right paid the diagnostic fee at the dealership to verify it was the mode door actuator. The tech was very knowledgeable and helpful. As you said re the mode door there is no wire to be able to monitor it without probing it as you did. He told me the mode door actuator failed, provided me with the schematic printouts for the system same as you showed following the colored wires. I bought a mode door from the dealer and left lighter in the wallet. I installed the actuator myself, bugger to get to and install getting the gear and dowel slot lined up. I tested the old actuator with an old 9V battery, it would rotate both ways, as the tech had said it was the feedback that was likely the issue. Fast forward about 3 months and the actuator failed again! Back to the dealership and spoke with the service department about the issue. They advised that as they diagnosed the issue, even though I installed it, it would be covered under the parts warranty. Fast forward since March 2020 ( yup, March 2020 ) and the actuator has not acted up since. My truck just turned 280,000 kms, so like 175,000 miles. Since march 2020 I have been working from home so the truck doesn't get used like it used to driving to work every day.
I admire your approach to verify before throwing parts at it, my hats of to you. Should the actuator act up again I have more insight into how to prevent replacement, thank you. Mine hasn't blown out the door sealer foam dust, it doesn't get that hot up here in Kanuck-ville, and the winters begin in Oct and leave in April. Thank you for an informative video, I've watched many on the "GM Mode Door" issue. None of them were much help, that changed today. Cheers Mate!
I cannot express how thankful I am to have come across this video. Mine has been like this for about a year. I tinkered with a few things before looking on TH-cam. I followed along and was able to do the same fix. Everything works as should now. Thank you so much for taking the time to help others out.
I have this same truck and same mode door problem. If I climb under the dash and help it off defrost then it works great, if it ever goes completely to defrost then it’s stuck again.
I refused to buy a motor to replace one that’s working, glad you figured it out for me! I’ll take it apart one day this week
Back in the early days, we just make sure your vacuum line was connected.
I gots to know. I don't know what I do t know. Eric is a wise man. Words of wisdom sprinkled throughout
The Avoca rodents ate his foam. I wonder if a 5.0V Zener would clamp that signal at 5. The electrical way of the screw. Keeps it from going over 5.
If I recall standard Zener voltages were 4.7 and 5.1. The screw fix is probably a better solution.
@@lwilton if you put in a 4.7v zener to clamp the voltage, when the zener started to "zener" it would draw a lot of current (limited by the controller, maybe) and possibly over stress the source or the portion of the pot above the wiper. the screw was an elegant solution. I figured Eric would epoxy in the nozzle from a can of Brake Clean!
@@lwilton NZX5V1B would do
I would have instead ohmed across the pot (i.e. tested the resistance between the actuator's ground and 5v reference pins), then added an appropriate value resistor in series with the actuator's 5v reference pin. For example, if the pot was 10K I'd bet that adding 220-470 ohms in series with the actuator's 5v reference pin would do the trick. This basically adds a bit of fake unreachable "range" to the 5v end of the pot's resistive track without any undesirable loading effects.
The pot is clearly just being used as a simple voltage divider, and this sort of minor addition to the pot's overall resistance is not going to bother the controller at all. The pot itself probably has a wider tolerance rating than adding 470 ohms to a 10K pot would introduce (+4.7%) anyway - it's probably only a 20% tolerance part to begin with!
❤❤❤❤ you are awesome 👍👍👍👍 THANX I love the way your brain works it's hard to find real people with real solutions and the fact you noticed the foam that came off the doors in the first place saved me a lot of time and money trying to buy a bunch of part that would of made no difference replacing !!!!!
30+ years from now, the old car hobby is never going to include cars of the last 20+ years and probably not the future. It's the plastics that are going to send cars permanently to the bone yards. Instead of the term "Rust never sleeps" it's "Neither does synthetic foam and plastics degradation". Being a southern car isn't going to save them either.
ICE cars are better now than they've ever been and probably won't get much better as electric cars will be taking over. 30 years from now people will be fighting over today's cars.
That is good work Eric! Your ethics should help restore the public's trust in automotive repair shops.
Ivan would be proud . Almost a Russian fix. Great fix and diagnose Eric
In Mother Russia, heater control pins YOU!!
@@markh.6687 In old time Mutha Russia, got no heater control, no heater, no truck, just Gulag.
That's always been what I've had issues with is finding service data and a base line of info unless testing against a known good part which isn't always cost effective pending year make and model..thank you for all your knowledge and work and sharing.! You're videos are awesome 😎
It's a whole different world down south. Instead of salt it's the heat that rots anything plastic.
And rubber!
Turns plastic into a brittle mess.
Heat. sand and lack of humidity here in El Paso... lately we been getting a ton of rain tho but everything is already rotten lol
Excellent diagnosis as always. Not throwing parts at the problem.
The last one that came in the shop all 3 motors were bad, mode, blend and recirc. The recirc motor was the worst to change. The customer brought me all Dorman components. Needless to say they were all junk and worked a couple times before they failed. I ordered ACDelco components and worked like a champ! Thanks Eric O!!
just want to say thank you for letting me see how it works, my pops just got a 2002 Sierra, and the defrost is where the air is only blowing out of. you gave ma a idea on how possibly to get it to work again correctly
Am i the only one that give a like before watching the video
Greetings from a big fan from the Netherlands
I give him a like before the videos on all the videos because I know they're all good 👍👍
Yep Anton, you know Mr O's video is gonna be a good one, even before we see it. He is a good tech/mech & teacher!
AWWWW no little red heart for you!!!
@@rons4452 shame lol.
Can't sleep now hahaha.
Can't get it all
Shows you are undiscerning.
I have the same problem no defrost on an 02 Tahoe. You are the MAN!
That 200,000 miles was just getting to Eric's shop. Nice work Eric, I need to look at my S-10 it is doing the same. Thanks I heard that comment about being a Hack.
It’s the vacuum line going to the drivers side fender urs is not electric it’s vacuum operates I’ve repaired hundreds of those line s
@@TheMechanicj yes I did have a problems with that. I will have check again. Thanks
Yeah it is a fun time to find that port let only push a tube on It. Hope you are good working with a mirror.
Great detective work Eric. Outstanding. Keep those videos rolling.
Good work I bet he keeps it like that since this old truck and it costs an arm and a leg to take a dash out 👍👍
this just started happening on my ‘01 GMC that has 145k original miles (super low for the year); thanks for the video!!! I gotta see of that white gear thingie is moving back and forth. Still blowing real good just won’t change back to panel.
Thanks for having us back, South Main Auto, always welcome in this house
Good info. the actuator date that I saw was 3/30/2020 on the unit. I beleave that it was a new replacement that did not fit it. Old school thinking. Spot on
I ment FIX It🤔
Me-maw would be proud!
You are my hero, I’ve been fighting this same problem!
Can't believe you're only at half a mil subscribers. Figured you'd have Kilmer, Eric the car guy and Chris Fix dying to do collabs with you so they'd get more popular.
Not a Hack Job at all. Just a way to fix the problem with minimal resources and save the customer time and money. And will last forever just like it is. Great Video! 👍
I thought I was watching Vice Grip Garage with the "Well I'll be dipped" quip.
Eric, you are the man. I had this exact problem with this exact year/make/model. No one (including me) could figure it out. I ended up mounting a stop on the dash to keep anyone from moving the control to full defrost. Now THAT was a hack job. LOL
If a serial criminal was being investigated by Detective O, we all know how that’d end.
Yea by subscribing and commenting!!!
Very good fix. Your right about checking the entire circuit and looking at data other wise you are just guessing and replacing parts unnecessarily. What you did was an educated guess.
Eric: As a retired engineer, I’m embarrassed that someone in my profession would design a system to fail in such an obscure way through nothing more than ordinary wear and tear. But good on you for going the extra mile to figure it out! I’m sorry you had to go through this. I imagine that GM considers an HVAC system design that fails as the foam disintegrates to be a “feature”.
Ingenuity at its finest!!! Excellent
you go above and beyond what most mechanics would ever do,, ABSOLUTLY FANTASTIC,, if you would not of done what you did that costumer would never had his heater control back,, YOU SIR are the BEST
I was waiting for you to snake your boroscope down in there and get a visual on the mode door over traveling. That would have been cool. Well done sir.
Eric, this diagnosis and solution, for me, validates your diagnostic technique. By following those proven steps you verified that the usual suspects were Not the problem and that led to creative / outside-the-box thinking … eventually resulting in a leap from blend door foam fuzz to an extended run on the defrost actuator. Absolutely brilliant!
A simple fix for a complicated problem. Great job !! You're the Shirlock Holmes of the auto repair industry. Thanks
Thats using the old noggin Bud.
Great video Eric! I just retired today - 42+ years wrenching. I will be lost without the 'theory and operation' section in the service manuals, lost access to the service manuals when I retired. On this problem it wasn't enough information. Great fix!! I own a 2012 Sierra so if this problem happens on mine it is getting the 'screw fix' Keep the videos coming!
You can Hack any of my rigs any day!
Bless you Eric and all your jibbery electrical jargen.
"I'll be dipped".....
Copyright Vice Grip Garage.
: )
I guess we know Eric watches Derek!
Vgg did not come up with that my Grandpa's been saying that since world war II lol not only that this guy will run circles around Derek we should all have a build off nobody wants to participate anymore in a friendly build off
@@goodfellasinc.5648 Eric is frigging awesome but don't sell Derek short. he's a very good mech
"The Beans" - Sarah -n- Tuned
@@halleffect1 Indeed, his recent three parter for the engine build of Independence is good stuff indeed! Also, the block turned out fantastic, can't wait to see it run!
2 weeks ago. I rebuilt the heater box and ac Evap core. Found Evap core plugged up. Took to car wash and cleaned the box and Evap core.i replaced my heater core anyway. My ac was never that cold. Found a mode door busted in two. I fixed my mode door with epoxy. Then put it in and fixed it. Had trouble with the mode door actuator. Went thru 3 Dorman actuators before my ac is working good.
Great diagnosis. I hope I had a true mechanic like you nearby. Let me ask you. Is moving to Rio de Janeiro, Brazil ou of the question? 🤔
😂👍
And yes, this was a very valuable video from a process point of view and knowing to think about thresholds and what might effect them negatively.
Have you tried the blend door relearn procedure… sometimes the actuators get all out of whack and you have to pull the fuse for 1-2 beers (10 minutes or so)😂 Replace fuse and then let the module “re learn” the actuator positions. Don’t touch the head unit buttons or dials when all this is happening, it will cycle through all blend door positions on its own and recalibrate the blend door actuators
Yes to this comment. My brother's Blazer of this era had this problem. Ran though all sorts of troubleshooting until finally stumbled on the blend door calibration procedure. Know knowing about it, should have definitely tried that first. From what Eric was saying, I wonder if the recalibration procedure info wasn't in the service data. It seems like one of those little secrets people either know about or don't.
A brilliant solution for a problem that shouldn't exist in the first place.
I wanna go back to the days of levers and cables. None of this electronic bs.
Remember when blend door meant each down on the outer kick panel and pull the handle had way back, and all that cowl air got your ankles and shins?
Hate the new electric stuff, always breaks down when ya need it most! And people wonder why I prefer working on classics than new stuff 😜 love the video dude keep it up!! this kind of thing keeps my mind working and sharp. Hate being unable to work anymore but would've loved to have done a project with you. 😁
I'm proud of my self I kept saying put a screw in it and you came up with the same repair. I really enjoy your videos
I early on suspected that the door was moving to far and a stop screw would remedy it.
You are a genius, great automotive engineer Bill N LINY
Extremely dry atmosphere in Arizona, destroys all plastics including the cheap foam GM puts in their vehicles!
@John Stone okay genius, maybe you need to explain it to everyone. Let us all know how the desert isn’t dry.🙄🤪
@John Stone didn’t you comment “false”? So I’m wrong about that as well. I’m no rookie by the way, seems to be offensive.
You mean the cheap foam China puts into GM's vehicles. That witch that took over GM is now getting everything built over in that God-forsaken place. They hat our guts and purposely make everything crappy.
AZ resident here and I just did my blend doors in my Dodge. It's not dry atmosphere, it's time and UV. As that truck is 20+, the cheap foam just broke down from age. UV can't get under the dash.
@@TheBigChinoDon so, ummmm... you are mostly wrong. It is a very dry atmosphere and the fact that the atmosphere is dry pulls the oils out of everything. UV does destroy plastic much faster but the dry air makes the plastic brittle. Foam will fall apart faster in dry climates the in climates with higher humidity. Your explanation doesn’t explain why plastics fall apart there faster then in Georgia. Sun is the same distance yet plastic lasts for longer.🤔🤔
I didn't see this video when it came out two months ago. I've seen some GM vehicles with inoperative mode doors that have to have a relearn procedure done . As the components wear, the position sensor voltage changes and the controller won't function because the learned position voltages are different. Sometimes a relearn procedure will let the controller relearn the voltages at either end of the potentiometer sweep. I can't recall from memory how to do the relearn. Might be worth a try on the next one that comes in.
Love your videos Eric. The thought process that you use and describe as your doing the repairs is as valuable as showing the work. Good job.
I have a 1994 VW VR6 Corrado that at one point spewed all the foam out the vents. Spent two days ripping it apart and another day putting it back. With the HVAC box out I had access to blend doors. I then replaced the missing foam with HVAC foam foil tape. I still have that unreliable Corrado today but the HVAC still works beautifully.😂
THANK YOU! Watching the actuator operate, seeing WHERE the panel position is and defrost position is under the dash on that wheel makes ALL the difference! Also knowing what position to have the switch in and where to set the gear under the dash. Thank you!
Love the channel~
Going through this with my 02 Sierra…excellent video! Thanks!
I am shocked this channel is not over 1 million subscribers. Great job!
Love watching your videos. Even on my days off, I enjoy learning more about car repair and using it at work. Also, every mechanic could be considered a "Hack Mechanic" if you watch them long enough.
I am beyond impressed with your diagnostic skills; thank-you very much for making and posting all the videos you have done! I wish I was 1/10th skilled in understanding electrical schematics...and knowing what appropriate tools to use and how to use them relating to electrical components. But then again, that's what trade schools are for and taking the theory and putting it into action. Be well and be blessed.
the fix is hilarious. I was sitting here thinking... "drill a couple of tiny holes and bust out the hot glue blob maker for a stop". hehe... then you pretty much did the same thing.
It would have been interesting to try a small resistor across the ground and signal to keep the voltage below 5V.
I may have done a similar hack on a TDI or two to limit travel when the manifold runner control linkage wears a little. Sure beats a new intake manifold from the dealer.
Love your always logical, ingenious approach. Great work guy.
That is interesting its like there is a problem with the electrical that is causing the actuator to get stuck Eric O @SouthMainAutoRepairLLC
Love your diagnostics. Who would find a reason to give you a thumbs down?
REALLY A SHAME THEY DIDN'T BUILD IN A LITTLE " WIGGLE ROOM" IN THAT SOFTWARE IN THAT SOFTWARE TO ACCOUNT FOR GASKET WEAR.
Classic GM engineering
Excellent tutorial. I hate the new stuff with the 5 volt garbage. Mechanical stuff is so much easier. Foam, how ridiculous! Wish I had a Wilbert close by.
If nothing broke we would not have SMA videos
I haven't got to the end of the video yet ...but sounds like there's an open circuit spot on the feedback pot near the defrost side. Then the signal voltage goes open or 5 volts... can't wait to find out thanks for the excitement:)