How to make a External Voltage Regulator to Bypass a Dodge computer, ECM
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- เผยแพร่เมื่อ 4 ธ.ค. 2014
- How to make an external voltage regulator fro an alternator.
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For a write up follow this link www.backyardmechanic.org/how-...
This can be used when the computer/ECM stops regulating the voltage. This can also be done to regulate any 12 volt battery alternator combination. It completely separates the voltage regulating from the computer .
Here are the parts I use. A junk yard would also have these parts.
Parts used
Dodge external voltage regulator (1971-1989)
Voltage Regulator Connector
14 Gauge wire (I color code mine red, black and green for a good ground)
Inline fuse with 15-20 AMP fuse (Not necessary but what I do)
Screws
Electrical tape
Wire Nuts (I solder the connections together but some people use wire nuts.) - แนวปฏิบัติและการใช้ชีวิต
ive been chasing this problem for about 3 months on and off...never realized the computer switched the ground side of that 2 wire connector to tell alternator to charge...thought it was bad battery or alternator or connection......great solution.
If your watching this video your alternator is probably overcharging. I did this and still over charged.
Jumper cable from each negative side of batteries to the block revealed bad ground at batteries.
They looked fine! I spent all weekend changing both batteries, alternator, cleaned all battery connections, rigged up a ECU bypass, and was just about to replace the ECU itself. REPLACE YOUR GROUND WIRE 1ST.
The Ground wires are always the most pain in the ass items to find when system is messing up everything..
you can look at the light system in any car.. front or rear of the car.. you have Brake + Back up + Driving lights "Maybe Turn light if it's orange lens" All hot wires..
AND 1 skinny ground wire heading to the back and most of the time a skinny little wire on the passenger side from the light's ground to the body..
Ground wires should be a size or 2 bigger when you have so many hot wires tied into them..
I added a 8 gauge ground straight to the alternator. Im charging 16.7 volts 2012 jeep wrangler i camt understand a damn thing this guy is saying on how to hook this up. Rambling on and on i kept hollering shut up gdt on with it. What did you do
Thank you for making these videos! It worked for my 1998 Jeep TJ!
Best information I have found so far!
Thanks man work perfect for my 05 Dodge Magnum no more light pulse much appreciated
Juicy info right here 👍 could benefit any modern car because they all have gone to computer regulation and they all want you to replace the computer if the regulator goes out. You are the 🏆
Thank you. You simplified it, explained well.
I see the light now , thanx . 83 d350 power ram , had it for long time and wires get hot and melt ,bad ground, winch dont help , little fire or 2, lol . Thanks again
Run power to the remote stereo wire. Its the same as an ignition wire. Plus it hides the wires and much more professional looking than wiring to fuse box. You won't be able to tell it doesn't belong to the car.
This worked on my truck, be sure and check your belt too, mine was bad but didn't look like is was
I have a 1998 jeep xj. and if you do it exactly how he says. It will perfectly. The best explanation on TH-cam for a external regulator.
How did you trick the pcm/ecu so that it did not give a check engine light?
You have no idea how much this helped😂
green wire has a very good conductivity. nice
I have a 2002 Dodge caravan, 3.8, can voltage spikes cause transmission problems, from voltage spikes?
Will this work on a 95 2500 5.9 gas engine? I'm stuck and NEED this truck running.
which year(s) of alternators is this for? I have an 02 Dakota and my alternator looks to be the same style as in your video, but just wanted to ask which year of alternator this mod works for. Thx
Hello I did a old school v8 carberator one wire distributor swap in a 2000 jeep wrangler and have been trying to bypass ecm for this. Thank you was wondering is it possible to do the same with the coolant and oil so the original gauges work??
I have a 07 Dodge RAM 3500 I did just what you said and the alternator is not charging . could it be a bad voltage regulator ? I got it from Autozone (duralast )
So I mimicked that today. Got my alternator to run and charge. The issue I'm having is that on my battery gauge on idle I'd say it sits at 65% but when I hit the gas and keep it on high rps the gauge bounces really fast between 70% and 75%. At the same time my dash lights flickers as well as my dome light. Like I said, I made a mimic so the way I ground it is by putting a wire from the negative battery post to the body of the evr. By your video I assume I need to ground it to the alternator? I have a 91 dodge d350. Any tips would be awesome!
Do I need a relay in conjunction with the regulator for steady charging or is the regulator enough?
Can this be done to and 06 Dodge ram Commons? I see everything about 2nd and 1st gens by I see nothing about their gens and this issue I am definitely having this issue and if this will help I will happily try it but new alternator and new batteries has not fixed my issue on my daily driven truck
Thanks for the video. Let me ask 3 things. This can be done with the factory alternator? If yes what I do with wires than come from the car to the alternator and leaving the wires unplugged can make the check engine light come on? Thanks
I am working on a dodge now. Which key on engine off. I have no 12 V on either of the two fields wires. I thought I should. With it running I have 12 V on both feel the wires.... if I ground the brown one the alternate a full fields.
I got a 05 stratus where it’s not charging. Has the 2.7 in it. I just want to know before I try it. Will this work.?
The orange wire in the video goes to the ignition circuit in the fuse box. When the ignition is turned off the charging circuit is isolated from the battery.
Thank you
Sooo.. does this go up to the 14.5 volts that newer cars need at times?
Question the red wire with the fuse on it .why don't you rub that to the ignition switch?
Will my battery light stay on or go off on a 2000 dodge neon
Hey boss- i did everything you said and my voltage keeps spiking to 18v , do you recon my new regulator is bad?
Will the dash gage still work after this modification?
Can you just use the bolt on the alternator as the ground and screw on the voltage regulator to it, instead of screwing on to the body.
I did this to my truck it works great
Question if you don’t ground that correctly, can it also cause your lights to flicker?
At idle my battery gauge fluctuates. Some mornings the battery is completely dead then i have to jump it. Any ideas ?. I have a 2000 jeep grand cherokee 4.7.
will it still keep the battery charged ?
Have you ever had one blow the fuse on the exciter wire. Mine does after about a mile on the road, a 20amp fuse. Other than that it works perfectly.
Hopefully before you buy the kit read this. My alternator wouldn't charge unless I revved the engine up and then after a few minutes it would quit. I thought it had to be the voltage regulator. I bought an external one and couldn't get it to work for anything no matter how I hooked it up. I got pissed and sprayed choke cleaner on the alternator (let it dry) and it started working. When I had it checked it happened to be charging. So if you haven't spent the money yet try that
i did the same thing w/ starting fluid worked awhile this system sucks. bad volt regulator burns up the computer? give me a break BS system
What tells the computer it's getting voltage? I bought a used Jeep with this Voltage Bypass installed and the dash guage/ Shop Diagnostic Redaer are saying the computer thinks its not getting voltage. But with a Multi Meter the alternator and battery are actually fine.
A old alternator shop guy told me the old Ford voltage regulators are way more durable than the Mopar ones the newer aftermarket ones might be better
But and original one from a junkyard dodge might be hard to find but no one grabs the ford ones at junkyard cause they never go bad
Would this work for a 2009 JK Jeep Wrangler?
Great video but how did you determine it was the regulator? And can I use your solution on Town and Country 2011? Anyone please?
Man my jeep voltage drops for 15.5 to to low 14 when I put in gear I run js 250 alt it is externally regulated what would stop this problem tried everything
Will this work for a 2014 dodge ram
Doing this now i have an 87 dakota that the previous owner switched to an older alternator and regulator . so now im dealing with all 3 batt alt n regulator
Will this work for anti theft light?
Hey, I installed a new battery and alternator, but engine still turns when I disconnect battery terminal. They only way I can check the alternator is when the engine is on, and I only get 12.5 volts and that voltage is probably from battery. I can't figure this one out if anyone can help solve this will be compensated.
I have a 2003 ram 1500 5.7 will this work
Still no a/c
Transmission not working as well is going just in 2nd gear or 3rd
I think i need new pcm
it is not alternating current, its DC to power the field of the alt, and if you say the blue wire has to go to power, yet they don't matter at the alt, then the blue wire can go to wither one as well.
thank you good information
it is good idea for other cars
but what purpose to bypass PCM
if PCM faulty it should be change obligatory because other functions to the car
You can have a situation in which the PCM/ECM internal voltage regulator is only affected and the rest of the PCM/ECM functions are working correctly. Rather than spending $800 for a new PCM/ECM, you can spend $40-$70 to bypass the faulty internal voltage regulator.
Can I get part numbers?
Very helpful.
Have you heard of the external voltage regulator going bad and not charging anymore?
im having electric issues with my PT Cruiser, it says its a bad battery, replace the battery, it says its a bad alternator, so i do that, the battery light keeps coming back on, i traced every single and cleaned every ground wire, im loosing my mind.
you're doing this because the excite wire (signal wires ) on alternator is dead?
which circuit in the fuse box would be good to tie into?
Hazard lights
is this for only dodge??? i wamted to see if this works for a chevy cobalt
As long as it is not a PWM (pulse width modulation)alternator it would work You could even use this regulator.
So I’m running car audio and having hard time getting my voltage hire . I’m buying a high out put alt can I hook this up and adjust the voltage up to 15 volts ?
I’m an installer. You shouldn’t need 15 volts. Are you having issues when your subs hit? If you’re having problems in car audio it’s usually a bad ground or the amp pulls too much from the battery. Double check your grounds and get a capacitor for your amp.
At 15.5 volts most car amplifiers produce exponentially higher watt levels than 13.5 and many folks up the voltage. Yes the current is the important number typically, but try it yourself, put an amp on the dyno and supply it 12vdc then 15.5 vdc, the numbers will amaze you. And you should make sure before you recommend a capacitor to explain what it does, some folks like myself don't want the amplifier(s) limited to the amount of current it can draw.
hello,
QUESTION, what if you took out the pcm all togeather and there was none. WOULD this still work, the external voltage regulator?
2. I would like to see this.
thanks
A car cannot run without the PCM.. individual components within the PCM can be spliced out or rerouted to a certain degree.
Would it not be OK to ground it straight to the battery and it be OK? Just asking because I'm fixing to do this to my 91 b350 van that's starting to any up charging. Thanks for the feed back in advance
@Nicks BS Corner would grounding to the bolts that mount the alternator up work
@Nicks BS Corner ok thank you appreciate it man .... Are you by any chance familiar with the external voltage regulator kit made by quick start ... They are sold online at alternatorparts.com
Off hand Any of these kits that need ground should go from NEG battery to Regulator to Alternator all the same wire.
Back of alternator would be the best in this setup..
since the Battery Hot goes straight to the ALT, So should the ground, However the ground wire I would use 1 wire with no cuts in it to make sure no problems with ground.. EVER.. lol..
So does the red go to the 12 volt source in the fuse box or directly to the battery
fuse box
not to battery it won't cut off if u do it that way and will drain the battery
How much voltage that regulator commands to the field engine run?
I believe that voltage to command field wire "open" is between 0.05-.5 volts on certain Mopar models.
There is also 2.4k ohm resistor located on the alternator itself that needs to be overcome for the alternator to make power on certain models (2006 and up).
Is the inline fuse just to ensure that you don't get an overcharge if the regulator fails?
AeternalDesigns Its just a cheap safety device, not really needed especially when tied into the fuse box. I use it since their cheap and it gives more control but most people don't. Basically a personal choice.
Great and easy to follow video. I am having a problem with too high of voltage (15.7 to 16 V). Any ideas what might be causing that? I replaced the regulator and it's still too high. I've double checked my grounds and they seem to be good. Thanks!
TO EASY TO OVER VOLTAGE? BAD BATTERY THE BOOK SAYS? CHECK GROUNDS?
Ck battery temp sensor
th-cam.com/video/K3EFGlHPFDk/w-d-xo.html
Clean connections and grounds and where the temp sensor is under the driver's side battery
What was it?
95 Dodge Ram 2500 Diesel. Dodge made very few of these ECU's (ECM), and apparently no after market ECU's (ECM). The entire thing failed. If I can't find one then then my truck is only good for parts or scrap metal, but this truck could be on the road for another 20 years if it weren't for this stupid problem.
I like this idea very much, but other than trying to get the alternator to charge the battery, the ECU also allows the over drive to turn on, plus the AC, and the tachometer to function, which none of them ar working on my truck. I need hacks for all of this and I could eliminate the ECU all together.
I'm not having any check engine lights come on. It apparently requires the ECU to function to do that.
K Zpodindustries
Mine was doing the same thing ended up being the crank case sensore
You are referring to the totally integrated power module, or what it really is, a fuse and relay block with a processor. I believe there is an attempt at a class action law suit over that issue. Jump on the band wagon, the more people involved the more likely the anemic judicial system will do something about it.
I have a 94 cummins and my mechanic is installing an external vr right now.
Honestly, if you can find someone willing to remove the computer and wire up the components independently, you can keep that beast running forever.
I know this was years ago... just hoping you were able to fix your truck! :)
i wish that you have show alt where to hook wires
He should have stated that you would have to look at the back of the Alt and see which ones are FLD + and FLD -
FLD + is the one from the middle wire location that gets 12 Volts from battery and the other wire FLD - goes to the third wire or outside wire edge of the plug ..
This should be a good look as how to wire it up. I know you don't need this anymore BUT you never know if you have a tractor or some other mode of transport that wont charge worth a carp.. This will give you a few ideas on how to wire them up.. Dodge style,. :P
www.imperialclub.com/Repair/Electrical/charging.htm
Hello sir
How to make india japan border voltage
fringeless you need to make a VIDEO!
how do you bypass the check gauges light with the wires unhooked
+DCRSNET Dispatcher The engine light will stay on. There are FRM (Field Replacement Module) that can work with some computers. Here's one on eBay www.ebay.com/itm/FRM-Field-Replacement-Module-for-Dodge-Chrysler-and-Jeep-vehicles-/151741276685?hash=item23547c220d:g:N64AAOSw9N1VnrPd&vxp=mtr
+aztikkel11 so if I do this to my 2014 ram 2500 its gonna throw a code? like the dash lights gonna stay on?
+cuzimaluzer777 The light will stay when this is done. I don't think I would try this on such a new 2014 truck. This is mainly for an older high mileage vehicle that that needs to be fixed cheaply.
+aztikkel11 right, I'm running a 300 amp alt. trying to keep voltage above 14.4 at idle. it's a huge issue .lol
th-cam.com/video/dBL1hgdzaNg/w-d-xo.htmlthis the way I did it
Whats the part number thanks
I had to switch the 2 wires to alternatoe to make it work...ita running at 18v and the dash is lit up like a christmas tree.
If you place a ballast resistor across the two wires that originally went to the alternator it will turn the battery light on the dash off. Just installed a external regulator kit on a Wrangler the other day. All the parts came as a kit. I'm sure it would be cheaper to source the parts on your own like you did.
What value ballast resistor did you use. I have just put a separate regulator on my 98 ZG Grand Cherokee and the check gauge, check engine light are on and the voltage meter is reading in the red even though about 14.5 volts is going to the battery. I need to fool the ECU and that ballast thing seems to be the answer. Thanks Sid
Can you snap a picture or draw up exactly how you achieved this? I want to eliminate the light myself!!!!! Thank you!
@@MrHeO2me too what u come up with 😮
Will this work on a 2009 Dodge Ram 1500 5.7 Hemi new alternator and battery still no charging from alternator
I wasnt aware I could do this so I have a shop doing it tomorrow morning :)
@@suicidegeisha6921 this WILL NOT WORK ON A 2009 AND UP
I have a 2005 1500 hemi
@@brianyerty6381 why not
Will this work on my 87 jeep commanche? New alt with internal volt reg and the computer is not telling the voltage regulator to charge the battery. Also no more key something is wrong with the key switch. Do I need to take out the internal voltage regulator out of the new alternator in order for your teknic to work? Great video by the way. I'm ready to sell this damn thing I been so frustrated.
The rig has been converted to a push button start. I still have to turn the key only for the fuel pump to turn on
I have done this a while back on my Dodge truck. Soon after you start the engine and the voltage gets up to about 14 it starts jumping up and down, the lights actually flash with the voltage, does the whole time, any ideas?
bad ground on voltage regulator, may be loose or corroded...
Can i do this to a 01 pt cruiser
I'm just came across this post but No..
you have an internal voltage reg on that 01 PT..
However.. It can be rewired differently cheap and easy,. I would have to look at the "I think " 3 small wires other then the Battery wire on the alternator and add a 194 bulb and a pig tail..
You use a good ground on 1 side and use the bulb as an exciter and the other wire goes to Alternator..
When you turn on the key but don't start the car, The 194 bulb will light up, Start the car and bulb is now off and your charging.. IF the alternator in that PT is good..
This is a trick I found out playing around back in the 80's trying to get an Chevy citation to charge because the ECM was going..
It worked for 5 years till the one girl got rid of the car..
Not to mention,. If u turn on the key and bulb is not lit.. Replace bulb.. It's blown.. Her 194 bulb never blew out because it's only on a few seconds or mins til you start the car,.
Also if the car is running while your checking any fluids lit the trans or power steering, You should not see any light on..
It's also a poorman's dashboard light.. Just way outta the dash and under the car hood,. :P
how did you get the heat shrink over the fuse holder and the plug end?
He didn't. He stopped recording and taped it. Duh. Huh. Sharp as a marble.
Put it on before you solder it.. Then slid the heat shrink tube over the solder joints and then shrink it.
What if it won't go to 15.5 , I ran 3 grounds and still going over 15.5 !! Any idea would be be helpful, thanks Jay
did you ever figure yours out I'm having the same issue
@@tonyderks9172 same issue, it climbs to 17
@@rylo2863same here climbs to 17 volts and my meter wigs out and just flashes 2 lines on the display..U ever figure yours out?
@@johnoates3326 I did figure it out, the main board for the truck had died and had to pay like a grand for a new board so it would work right.
@rylo2863 I added a external voltage regulator like this video and mines charging now..I need a new computer soon though..Runs rough and uses more gas
ok, so i have a 71 dodge W200, and i got a new altornator, and it only has one wire connection leading to the regulator, so only one connects, not 2, so how do i bypass that?
Single wire alternators are internally regulated at the alternator. Also known as a self exciting alternator, no way to easily wire this in and it isn't necessary. These are usually used to remove voltage regulation from the computer.
hi that Work in a dodge ram 2011 5.7 hemi
go to junk yard to find parts? on what yr cars? be lucky if they have older cars!
The battery will drain because the "center" wire of the voltage regulator needs to go to a switched ignition source, NOT an always-on battery source. Just my .02
Why would this slowly drain the battery ? and how slow does it drain would it be overnight or is there a certain time you have before it gets too low to start ? By the way this is a great info video saved my ass thanks !!
If you have power going to the Regulator it will send a magnetic field to the alternator as long as it has power,.
If the alternator is spinning you have charge "13.5 " from that magnetic field.. Not running and you just have a elector-Magnet..
i did this the same way you did and i am getting 18 volts i tried 2 grounds it will not drop below 18 volts
The regulator may be bad or having an issue. Also, check for a small Potentiometer on the back, since there are adjustable regulators that allows the voltage to be adjusted down.
What purpose does the fuse serve if some people don't use it?
I think he misspoke.. It should be used threw a Fused switched circuit..
Key on fuse hot system ready to go.. Key off fuse dead system is resting..
Am I supposed to remove the connection to the ecu? I only get 12.6v from my regulator.
Depending on the year, make, model of your vehicle (2006 and up usually), you will need a modified field driver attached to the alternator itself and a 2.4k ohm resistor added might need to be added on the field sense wires in order to trick the PCM into thinking it's operating correctly. Otherwise, the PCM may throw a check engine light and low battery light indication.
The PCM internal voltage regulator puts out voltage signal between 0.05-.5 volts to the alternator which "opens" the alternator charging circuit. In-turn, this enables the alternator to begin charging the vehicle electrical system at ~13.8~14.6 volts.
It is doubtful that you could remove the PCM connectors to the internal voltage regulator portion of the PCM and not have the computer throw a fault/trouble code of some type.
@@TB0321 I messed up and didn't even realize the 120 amp alternator fuse had been vaporized. There was absolutely nothing there at all but the posts. After replacing that I slapped in my old pcm and everything is running again😁 thanks for the info tho.
@@indiehandstudios5711 Glad you were able to get it sorted out!
@@TB0321 i have an aftermarket highoutput alt would i still need a modified driver and if so why
@@flbassmaster5551 Depends on the Year, Make, and Model of your Dodge. Basically, the PCM has an internal voltage regulator. If that function is no longer working, you either need to get a new PCM or you can bypass it and use an external regulator.
The PCM Internal Voltage Regulator monitors electrical load and increases (or decreases) load as appropriate. The field sense wire(s) sends a . 05-. 5v signal to the alternator. Once the PCM internal regulator "senses" that the alternator is receiving the signal, then the PCM will command or drive the alternator voltage (usually this will vary depending on battery voltage, stereo, defroster, Air cond., etc).
If you bypass the PCM internal regulator, you need to "trick" the PCM into thinking it's still working and sending (and receiving) current to the alternator. A Field Sense Wire Kit puts out a constant voltage to the alternator, which allows the aftermarket external voltage regulator to now control the voltage output. The aftermarket external voltage regulator will put out constant voltage instead of varying according to electrical load.
If your vehicle uses internal PCM voltage regulation and you don't use the field sensing kit, then there's nothing telling the alternator to start producing voltage (electricity).
is there a way to have an external regulator but keep the battery gauge working in the dash?
Good question! That detail is not mentioned in the video. (The "check engine light" remaining on is also a problem when it comes to getting your inspection).
I have installed this in my 2002 ram 2500 and the check engine light is not on and my voltage meter works on the dash.
@@19gmartin84 did you cut the wires at the alternator plug or do an inline splice and leave them connected to the pcm
Where's part 2
Followed to the "T". Didn't work for me.
I'm dealing with this right now and it's still not charging. I have a brand new regulator and alternator
Did you is the regulator and alternator still hooked up to the rest of the car or was all them extra wires removed and only the NEW wires should be hooked up for it to charge right..
you have to disconnected it from old charging system .. Only the BAT hot cable and a good Ground form your battery should still be hooked to the Alternator.. Nothing to the Field wires ot the small wires .. Just the new wire set up. look here for " ideas " maybe something will click to help...
www.imperialclub.com/Repair/Electrical/charging.htm
If you have a 2005 and newer you probably need an updated driver. U can find them online sold by quick start. I just installed mine and same thing. It doesn't work cause it's a 2017 and I called quick start and I need an updated driver
@@jbucku324 why do you need and updated driver?
simple perfect fuckn vid
Im doing that in the am
thank you
I cannot believe everyone installs them this way. Way overkill. On Dodges and Jeeps, the field has a green/orange and green wire that controls the field. The green/orange comes from the ASD relay and is +12v the solid green is negative (high speed switching via transistor) from the PCM. All that you have to do is cut the green wire at PCM and run the green wire to the green at alternator and splice the blue wire to to the green/orange wire at alt plug. This is a true "two wire install". No wires "bypass resistor", relays yada yada. Why install fuses and all that shit when the factory already has it there. You get no check engine lights, volt meter still works. PS. the green/orange is the voltage "sense" You took a 15 min install and turned it into a mess. If your wiring colors are different then turn your key to the on position and find the +12v at the alt plug and slice your blue from the VR to it. Mount the vr in front of the battery on radiator support.
fringeless hey can u explain more about hooking up the wires I like ur idea with no cel on thanks
I'll get to it when I get home
fringeless thanks
has he posted more on his idea.?
realcoolphil no I just hooked it up and installed mine I do get cel light but until I figure it out it's staying how it is
Apparently some 06 and newer Chrysler and Dodges come with the Denso and Niccondenso alternators that require the modified driver. The guy has a video on here with a link to the website and the phone number too. Its the video by alternatorman
You did not show each connection in a vehicle
Earthquake!!!!!!
no its not enough coffee.
will this work on a newer Dodge??? 2011
With the Quick Start Voltage Regulator Bypass kit you can install this kit on newer vehicles with modified driver, plus support
My alternator is still throwing out 30 volts. I'm ready to burn it to the ground
Did you figure it out cause I literally have the same problem with my 04.5 common rail. 36 volts with new alternator
@@witte1919 no I haven't figured it out yet. I'm going to just get a new ECM for the jeep. I have tried several times with different external regulators and still having no luck with it. Hope this helps steer you in the right direction. Good luck!
Yea I’m in the same boat about to order a $1200. pcm tested the circuit from alternator to pcm the harness has no load drop it checked out good I’m running through a few other things today before I bite the bullet.
protein deficiency is a cause of shaky hands.