1947-87 Chevy & GMC Truck Custom Wiring Install Tips & Techniques
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- เผยแพร่เมื่อ 8 ก.ค. 2024
- Custom Truck Builder David Welch gives us his best Tips & Techniques for installing a custom wiring harness in a Classic Chevrolet or GMC Pickup. If you've got a Classic 47-87 Chevy or GMC truck and need wiring, electrical or anything else, we've got you covered.
Product Links:
Classic Update Wiring System
www.holley.com/brands/brother...
Crimping Tool
www.holley.com/products/elect...
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Instagram: / brotherstrucks
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Man..... thank you. Never had a dad to explain this shit. You were right in the beginning. You took all the fear out of it.
Thanks man, glad to help!
I have watched many TH-cam clips and never subscribed to any channels until watching your clips. I found them so helpful, clear and informative. Your a great teacher. So thank you and keep posting.
Thank you for the feedback!
I'm actually in the beginning stages of restoring a 1969 chevy C-10 pickup original 327 v8 400 turbo trans and 411 posi rear end. I cant even remember how many of these videos I've watchedlol. But the Brothers are always the best ones. Always helpful information.
Just bought my first old truck 46 chevy , great to find someone who explains stuff without over complicating everything, Thanks
Our pleasure!
Impressive video! Detailed and amazingly well explained. Thank you for this video!
I'm halfway through watching this video. I seen a section I thought I would comment on regarding soldering.
This may seem obvious to those that have soldered on electrical/electronic equipment but (NEVER) use plumbing solder.
I had a friend restoring a 66 Chevelle SS. He commented to me how some wires and connectors he had soldered on a stereo
were corroding very badly. He ended up having to throw away the stereo because the corrosion had traveled into the stereo as well as several
connectors. Upon discussing this with him I asked him what type of solder he had used. This is when he mentioned the plumbing solder.
Plumbing solder is only meant for pipes. Not electrical equipment!
The guy I mentioned is a talented guy. Nothing seems impossible for him. But this is one of those things that just got him.
Wow, great advice!
You and brothers trucks are the bible to me 64 gmc build. Thanks for all the tips .
This video got me off the sofa, and back on track with my project Van. Doesn’t seem so scary now. 👍
Man, this is great motivation for us to keep making videos! We want people to work on their projects and feel comfortable doing ti! Thanks for the feedback!
perfect just started my 85 s10 project . did everything u said not to do. this video got me back on track. wow 👌 👏
I dont have a truck, I have a 72 Corvette that I'm about to completely rewire.
Man this video helped a lot. Thanks for the tips and tricks that will make my life much easyer.
Ok later I might get myself a truck LOL .
Thanks for watching!
Thanks, I will be doing a 68 very soon. Your video has made it clear that Brothers is the way to go. 👍
Thanks Darren, good luck with the project!
Lots of great information in this video for someone rewiring their truck themselves thanks for going through all that
Thanks for watching!
Dave's videos help me a lot keep them coming
Will do!
Awesome video. Im doing a kit as we speak for an 84 K10. Been a learning process but Im glad I did it.
Thank you for watching! Good luck with the project!
Great stuff Brothers & Dave!
Thanks Tony!
Thanks Dave you provide the confidence and also well detailed video
Glad to help!
So many great tips in one video! Thank you for sharing your knowledge!!
Our pleasure!
That was a whole lot of useful information packed into one video. I’d say one of the best tuts ever. Thank you! Subbed
Thanks for watching!
Very informative and helpful. I watched for the 2nd time and picked up a lot more. Thank you for posting this video. Well done!
Great video, I’ve been chasing down an issue with my voltage gauge bouncing and I’m sure this video will help in the process of fixing my issue.
Good luck!
I really enjoy these videos ...feel pretty good when I get to this point I'll be able to do it
None of this is that difficult. That why we make the vids so people can be confident when they dig in for themselves! Good luck with you project.
Very good information, always learn something when watching his vids! Thanks for sharing this info!
Our pleasure!
very good presentation and the products you have appear to be high quality and easy to install a big thumbs up
Erwin, thank you for watching!
Thank you, thank you, thank you , you have no clue just how greif that you helped me out with that I've forgotten over the years and now have to flippen remember lol restoring a 78 GMC c class, 1 ton frame, and you have helped answer alot of issues for me so thank you, thank you, thank you sharing your video with another friend who's doing the same as me but he's 11 hrs drive north of me lol
Very well done, very informative, thank you!
Absolutely, we enjoy making videos that help the hobby!
Dave, you explain things very well and you're very talented. Thanks
Thanks for watching!
This was very informative, well explained and demonstrated. Thank-you for the video, I feel a lot more confident in doing this myself. Nearly every grey area I had was covered in your teachings. I look forward to ordering a kit and doing this to my 1986 K5 Chevy Blazer. Hello from Minnesota!
Thanks for watching and the feedback. Good luck with your project!
Good information, but still outta my league, want to wire up my 1975 K10? I'm local
@@kellybergin1532 What part of Minnesota if you don't mind me asking?
Recently bought a c10 and have been doing a little bit of stuff here and there to it and i gotta say this guy is awesome straight and to the point no bullshit just hey you want to do this to your truck then do this
Excellent video. Im going to need to watch this a few times.
Right on!
Super awesome job! Thanks man!
Thanks Vern!
So many helpful tips!
Thank you!
Great idea on the custom panels in the cab for the 6X9 speakers behind the seat
Thanks Matt, available for 1960-87 Chevy & GMC Trucks at www.brotherstrucks.com
Good job.
Probably one of the best wiring explanations out there.
Also. People. ... Understand.. if you buy a cheaper harness.. there might be a reason. Some come with features that make easier, both install and diagnosis and future. You pay for what you get in this case.
I would like to see you guys do better bench seat cover install.
Thanks for watching and the feedback!
"We're going to get your truck back on the road"... He says it like he really means it. That's cool...
He really does mean it! Thanks for watching!
I am about to do this myself, he explains so well and makes it look so easy, i got this 👊🏼✊🏼
Go for it!
Take your time
Hope it went well
That will be a job that I will be doing later on. Good tips, I like solder and shrink tube as well. Just makes it look more professional.
Thanks for watching!
Great video. I am wiring a ford but this was great. Thank you for your time!
You bet!
Nice job with the video! Very informative.
This is something I wish to tackle myself on my 1957 Chevy 3200. Thank you. I can feel the money leaving my body and satisfaction coming back once is all works. I really appreciate the advice on the grounds. I never understood that multiple grounds could be necessary.
Good luck with the project man, it's not that hard.
Yes indeed. Cab? Rubber bushings break [or at least dirty up] return connection and a shunt from cab to frame is bare minium. Same for motor & transmission mounts [most vehicles]. Odd note, but for a 50's ride, if you think you find cotton jacketed wire [as some kind of farm fix], its not - that's AF wire. Replace it, because its day has come and gone.
Saw this 2 yrs later did u end up rewiring ur 57 I have a 58 c10 and I'm trying to see if this is a good choic
@@jakey1192 A "shop" had my truck for around a year and a half and I got it back a few weeks ago. It’s now at another shop that is actually earning the money I am paying. I have not done this yet.
Thanks Dave, that’s helpful!
Thanks for watching!
Great video!!!!
Very informative
Great lesson.. very helpful... thanks...
Thank you for watching!
YOU GUYS ARE THE BEST!!! this is a perfect explanation and helps me out with my 67 chevy!!
Thanks for the feedback and thanks for watching!
Great video thanks once again for the good explanations u are a great teacher. I did learn allot 👍🇩🇰
Thanks for watching!
Thank you u did explain everything very well
Glad it was helpful!
Very nice !!
Thanks!
Amazing video just what i needed to hear and see!! I'm going to order the harness. If I tried piecing it all out, it would cost me 3 times as much, take me 20 trips to different stores and lots of returned items.😭
Right on, thanks for watching!
Dave you are a beast. Please do one for the one piece window kit. I know there is already one, but do another one.
That's actually on our list of videos to do early in the new year!
Thank you much because I got to do this to my 57 gmc
Good luck with your project!
About to try this myself! Good explanation, luckily for us new guys they already come kind of separated into sections so that’ll save some time
Good luck with the project!
@@BROTHERSTruckPartsTV thank you! I’m already halfway done
I have pulled many "hand built custom built harnesses", sure is alot easier to run with kit's (some friends just wanna save a buck!--lol) But well done video!!! I am an automotive electrical engineer/electrician of fire apparatus, so believe me when I say, you did a great job in this video sir!! (current projects 1964 chev C10 p/u and an 86 (V8) S10 with Weldon V-Mux multiplexing, push button start, digital display,cyberdyne gauge panel etc.--so the S10 will require custom built v.s. a kit..) Again Excellent job!!
Thanks for watching and the feedback!
Thank you!
You're welcome!
Love this guy! Love these videos!
Thank you for watching!
Electrical is my biggest fear thanks for putting me at ease . Thanks again David I have done and taught a lot and am so thankful for your details and experience makes this a lot more comfortable for me
Thanks Mark, good luck with the project!
I like his attitude
Smooth and easy!
This really helped me lol I’m only 17 redoing a 1978 k20
Right on!
@BROTHERSTruckPartsTV how did you get the coil wire to stay hot when cranking mine goes dead I don't know if that because mine use to have points
Thank you this video helps a lot. Just wish I had watched it before I installed mine. But it was not out yet. My bad luck
Man, bummer. How did the project go?
@@BROTHERSTruckPartsTV Im still working on it. today wiring the dome light to some door triggers. I bought a lot of parts from brothers
@@johnc.wunscheljr2873 Awesome! Keep us updated.
My boyfriend as a 1981 k10, some how is having issues with his truck dying.
Alternator is good, starter new, battery new, but head light and radio seem to drain the battery gauge.
He's got a parasitic draw on the battery. Hane him start disconnecting one thing at a time and eventually he'll figure out what is the root of the problem.
thank you for that... i am about to get a '77 g30 chevy back and going and the wiring is like spaghetti
Have fun with the project!
I was in the market for a wiring harness for my 1978 C20 and found this video very useful. I visited Brothers website to check the price and decided to buy, not knowing if they even delivered to the UK. I placed my order on 15th September which was uplifted somewhat by the shipping cost but not unexpected. On the 17th I received a considerable refund, whether it was a sales discount or shipping adjustment is still a mystery to me, but happy days. The goods were received on the 22nd, just 1 week after ordering. Very pleased with my purchase and Brothers response, I will no doubt be doing more business with them and hope they take the time to read these comments for this feedback. Thanks David.
Thank you for your comments and for sharing your experience!
What I did that I find helpful, is make a list of what connectors you are going to reuse and while removing the old harness cut the wire about 2 inches from the connector you are planning on using. That way you know where it goes.
Really good suggestion! Thanks for that!
Great video. Wondering where you chose to install the mega fuse block. (The one between the starter and alternator, etc.) Did you mount it to the firewall? fender? Thanks!
We tucked it up under the fender.
Has anything like this been done for a 87 s10? I will be using a stand alone ls harness for the engine I'm just needing something to retain body functions like brakes tail lights, etc. Will be using aftermarket gauges. @brothers
Just bought my first C10 (64) and the wiring is a mess! Great video and easy sub for me. Will be checking out your other videos. What was the tool you used to remove/release those connectors so they can be reused?
EDIT: is there a connector pin removal set specific to GM?
I had emailed brothers truck (Holley) for advise on complete wiring harness for a 1971 gmc c2500 but they said they didn’t had for my truck,so for any guys reading this ,any advise for recommendations I should get ?
Do you gut all the existing wiring or only certain wires
Thank you for putting this video up! I am looking to replace the wiring harness in my 68C10. As far as I know all the critical components work fine. My plan is to do many upgrades to the truck. LS, Vintage Air, Power windows, Upgrade sound, electric fuel pump, more interior lighting, tank to rear, LED lighting, etc. Will I need to use your engine harness or the one with the LS engine, or combination of both? I can't imagine the factory engine harness even coming close to working with an LS, and I cannot see LS harness hooking up to the old truck connectors, etc. Help please! PS I'm happy to buy the stuff I need from you.
This harness work with an LS install just fine. As a matter of fact, the truck shown in the vid has an LS in it. Your specific LS wiring will be different based on what electronics you use to run the ECU, but this harness will work fine.
Fantastic video , I bought a 1972 GM that needs to be rewired . The only upgrade I will be doing is the distributor and alternator . What wiring harness would you recommend . Cheers
We really like using our "Classic Upgrade" harness. easy enough to use because of all the plug-n-play features, but offers the flexibility to expand later if needed.
great video I just finish wiring my truck but having problem with my dash gauges nothing working but the RPM gauge any advise you can give me
Best place to start is with the ground. Attach a separate ground wire to the back of the gauge housing and run it directly to somewhere on the cab and see what happens. If it's not that, then it's likely your 12v power source to those gauges.
Thanks Dave, great video. I’m going to reword my 54 Chevy truck soon probably with a brothers kit, about how long will it take from tear out to installation?
Sorry I meant rewire not reword sometimes these computers have minds of their own!
There's a few variables with each truck that can speed up or slow the project, but I basically set aside 15-20 hours total for a nice clean tear down and install.
If I’m running Holley terminator on my truck does this tie in
I want to remove the saddle tanks from my k25 and place a 40 gal suburban tank. Is there a kit to place the filler assembly behind the drivers side taillight for a hidden fuel fuel cap on a 1976 GMC? Thanks for any help
There's no kit available at the moment. Sounds like a custom job, and a great idea!
I have a 1980 C10 Big Ten Silverado. Would you know the original stock circuit wiring harness , that it came with for that year.? I would like to purchase a new harness. That has the correct number of circuits for my chevy C10 Big Ten Silverado. Please advise. Thank you Robert. Also my old harness has been replaced with a 12 circuit harness. Would I need a bulkhead connector if purchasing a new harness? Old bulkhead connector is trash.
Nice hair looks better than mine lol
Thanks!
Thanks for the video Dave and Brothers Trucks. Although I have used many of the techniques seen on this video, it's still nice to watch to brush up on my skills. It's nice to know that I can pick up a relatively complete harness for my '68 if I ever need it. Will it work for LS conversions too?
At the 8:11 mark, I've noticed that you have an LS motor DBC under the hood. I would like more information like parts used and installation process, plus your version of wiring harness and ECM. I also see that you had kept the OEM dash gauge assembly. I have a 2001 Suburban with the 5.3 LM7 and the 4L60E transmission that I want to use for my '68. My plans are to rework the Suburban 5.3 wiring harness and convert the transmission from a 4wd to 2wd.
Our harness in this video will work with an LS swap just like the truck in this video. We'll see what we can put together regarding the LS conversion and parts used for a future video project
@@BROTHERSTruckPartsTV looking forward to it.
I had emailed brothers truck (Holley) for advise on complete wiring harness for a 1971 gmc c2500 but they said they didn’t had for my truck,so for any guys reading this ,any advise for recommendations I should get ?,thanks in advance
I am trying to figure out which harness I should buy. I have a 66 C-10. I am adding an A/C to it and that is about it. I dont know if I should get the 13 circuit or the 20 circuit
The 20 Circuit is the most common harness we sell, and we recommend it over the 13. It's just always better to have the option to expand instead of cutting into the harness later for something.
Do you have a link are part number for the mini fuses block and red wire that goes from battery to starter, starter to fueses, alternator to fuse box?
That was a generic item we picked up at the local parts store. We don't sell them here at BROTHERS.
Can I do sections at a time like the wiring for the dash and the engine only?
You could, but keep in mind you won't be able to use the truck until you are finished with all the segments (except accessories)
Awesome video. Say do you have a link or at least the description for that crimping tool? It looks like a gadget to have. Thanks!
Here's a link: www.amazon.com/Fryic-Terminal-Insulated-Receptacles-Plier-Ferrule/dp/B07LF4K3VK
Do you have a kit recommendation for a 1982 GMC P3500 panel van, gruman olsen, kurbmaster (food truck)? Awesome video!! We are rewiring a '68 C10 as well so super excited to see this on here.
We sell a kit that is more universal as well, or you could use this same kit but some of the plug-n-play features will need to be modified.
Thank you for the quick reply!!
do you happen to know how to install a pvc air horn-12 volt with compressor on a old truck? i have a 77 chevy truck and im trying to figure out how to do the wiring for it. any ideas?
Sorry, we don't have any experience with PVC Air Horns.
I see the crimping tool recommended is no longer available. Would you please recommend a replacement? Thanks
David do you use the same crimper for the double wire for the headlightss for example?
Yessir!
Is this wiring kit one that y'all sell. I saw several kit and was wondering if you had a part#
Donald, The links for this kit as well as the crimping tool used in the video are in the video description. Thanks for watching!
Hi, I have a 59 Chevy truck fleetside with a 235 engine. I want to keep the generator, add the original heater system and turning signals. What Kit would be best for me?
We typically recommend the Classic Update harness like the one in this video. It gives you a lot of ease of use and also allows plenty of flexibility when adding options like a factory heater. Additionally, you could just install a complete factory style harness which can also be expanded to use the factory heater and everything on that harness just plugs right in.
Do you have a part number for the jaws you used in the ratchet crimpers?
We don't, but you should be able to find a similar set on Amazon or Eastwood.
What was the solution to the faulty ignition switch when turning to start ? Replacing the switch?
Exactly!
The mark of a guy who’s been there and done it more times than he remembers.
Bad grounds, the cause of loads of freaky electrical problems.
We appreciate you watching, Thanks!
You video as always Dave. I was wondering whats up with the website. I was looking to order some new seat covers and it comes up Holley. Just wanting to know if that is the right site now? Keep up the great work.
Yessir! BROTHERS is now part of the Holley family of brands.
I'm not sure what type of shrink tubing is supplied with the kit. For any thing out side the cab use marine grade shrink tubing, it is adhesive lined.
Great tip!
I hope these have heavier wire than that Christmas light shit GM uses. I can't tell you how many cars I had to completely redo with #12 THHN. The factory wire was so thin, just stripping the insulation broke the conductors just about every time. Also, is this the same harness I need for an 85 Suburban?
This would be the harness we suggest for your 85 Sub. Wires in this harness are typically sized and suited for their intended use. Whether that's the same as GM, in some circuits yes, but in most they have been updated to handle a more modern application.
Will the Complete “classic update” wiring harness come with every harness like the engine harness and A/C, front light, transmission, and the taillight?
Yes, everything you need front to rear.
is this for the 20 circuit harness? or the full update harness?
whats the difference between the two harness kits?
This harness is the Classic Update Harness. The main difference is that there is a lot more work to do with the 20 Circuit Harness than with the Update Harness. The Update harness already has a lot of stuff pre-wired so you don't have to do it yourself. Here's a link to a comparison video we have: th-cam.com/video/qfGF9C2Q6ac/w-d-xo.html
You do explain things very clearly, but I doubt I could replace the gauge myself. I'll have to take it to an auto repair person, but it would be helpful if I had some idea as to what's causing the problem with my 2005 Chevy Malibu gasoline gauge. The indicator needle vacillates between full and empty (usually goes to empty when I stop at a red light). Can you give me some idea as to what would cause this problem?
It sounds like a failing sending unit, but it could also be an intermittent dead short on the sending unit wire that only shorts when you are braking.
@@BROTHERSTruckPartsTV Thank you!
Hello can any one help me I did one of this wiring kids and I’m not getting spark not sure what I miss?
Could be a few things, but way to difficult to diagnose in TH-cam comments. Please call our shop at 800-977-2767 and we'll try and help you sort it out.
I bought a used Motor that I haven't installed my ? Is I'm new doing this but I need to crank the motor and check compression I don't want it to start it just can I do that.
Yes, you can just turn the motor by hand using the front pulley.
Does that harness have AC connectors Can i use that harness in the video on a 1988 Chevy pickup
Yes and yes, check out the "Classic Update" harnesses at www.brotherstrucks.com
I ordered one of the 12 circuit cheapo ones for my 69 c50. It only needt to start run amd have signals maybe but what im curious about is wiring the guages. Theres one air pressure guage you gotta press a button running off that to power tge hydraulic winch amd dump controls
Our "Classic Upgrade" harness takes care of most of that gauge wiring for you, but your truck has something unique that most don't with the hydraulic system. However, the Classic Update harness is plenty flexible to accommodate that system while making the rest of the install much, much simpler.
I wish i had the 600$ to buy it. I paid 99 for what i got cant barely afford that lol fuckin virus shit. I gotta make this thing a daily too as im just that hillbilly hahaha
@@maxmorter503 Yep, we get it. Work with what ya got, it will get you there as long as you make sure everything has good connections and gets properly grounded.
Appreciate your time and kindness i will definately keep you in mind for other projects down the rd