73-87 wiring diagrams
 

anyone got some wiring diagrams for a 73-87 truck? the wiring on my 80 is rather hacked up and i'm gonna be doing some extensive wiring repairs.

Re: 73-87 wiring diagrams
 

Some stuff here
http://www.chuckschevytruckpages.com/77fusebox.html

Poke around on the site there is some other diagrams as well..

I know I have others, I'll look

Drew

Re: 73-87 wiring diagrams
 

Here are some 1980 diagrams for you.. And

Since I found a few more of the diagrams I had, I created a permanent web album for them. They cover 1967 - 1987 Chevy Truck and Blazer. Not complete yet, but I will add to it as I find them. If anyone wants items added, just email them drew@eyehike.com

Re: 73-87 wiring diagrams
 

www.autozone.com has some diagrams. Click on Repair Info, then on Vehicle Repair Guides. Pick your vehicle, then click on Chassis Electrical, then look low on the right for Wiring Diagrams.

Re: 73-87 wiring diagrams
 

I have a GM wiring diagram book for Chevy 1973 light duty trucks. I need to scan them in so I can share with all. I will try and remember to bring it to work tomorrow so I can do that.

Re: 73-87 wiring diagrams
 

Here's a couple basice wiring diagrams for a 1980 C10, hopefully you can see the attachments. If you need something specific, I can probably narrow it down for you. Mike

Upload keeps failing, sorry.

Re: 73-87 wiring diagrams
 

well none of the attachments/scans showed up on my computer. hm....

Re: 73-87 wiring diagrams
 

Any update on this, do you have an address fro the site? I'm looking for an 85 diagram, bumper to bumper.

Re: 73-87 wiring diagrams
 

Try these...
- Dave

Re: 73-87 wiring diagrams
 

I posted this the other day, but here are the ones on my site:
http://forum.73-87chevytrucks.com/sm...?topic=11766.0

Re: 73-87 wiring diagrams
 

Oh man, that's awesome! Thanks!

Re: 73-87 wiring diagrams
 

u da man!!! :)

Re: 73-87 wiring diagrams
 

Chris very good stuff!

Re: 73-87 wiring diagrams
 

COOL, I just found the answer to MY question also! Great stuff Chris!
-Lance

Re: 73-87 wiring diagrams
 

I will be printing all this.

Thanks

Re: 73-87 wiring diagrams
 

here u go

http://67-72chevytrucks.com/vboard/s...d.php?t=380904

Re: 73-87 wiring diagrams
 

I have one for a 1985 that I used to rewire mine. It is a pdf file but it won't let me upload it. If you want it or if someone can upload it for me shoot me a pm with your email.

Re: 73-87 wiring diagrams
 

im working on doing the diagrams in color. It wont be nice quality but it will be colored. I know someone else did one in high resolution for the 67-72 which looked great unfortunately I cant do it that way.

Re: 73-87 wiring diagrams
 

I just have to say that you guys are awesome!!!
You won´t find that much help and patiance anywhere else i believe!!!
being here is just great!
Volker

Re: 73-87 wiring diagrams
 

i have a complete set of electricial prints for 82 model trucks ... i purchased for the restoration of my 82 stepside...if anyone needed a copy id be happy to copy and mail them a set....

Re: 73-87 wiring diagrams
 

Old thread, same request so thought I'd renew this one.

I need a wiring diagram specifically for an 87 chev 4x4 with dual tanks, if it even exists.

All kinds of one offs here, mostly TBI on the 73-87 body style.

I'm donoring a cab from a 2 wheel drive single tank to a 4 wheel drive dual tank system and need to know the wiring for the tank switch and where to tie in the 4wheel indicator light.

I would love to use the old wiring harness as an indicator, but the dingbat before me burnt it and then proceeded to cut it all out and throw it away.

Dummy me got the donor truck with the promise it had dual tanks, and I was too stupid to check until now..ugh. Live and learn. Any help would be appreciated guys.

Re: 73-87 wiring diagrams
 

Attachment 1008574

Attachment 1008575

Attachment 1008576
Does anyone have a clue where these wires go?

Re: 73-87 wiring diagrams
 

Looks like a/c wires
Posted via Mobile Device

Re: 73-87 wiring diagrams
 

This harness is for the Electronic Spark Control HEI distributor on a 305, or perhaps other engines too. The connector in your hand goes to the coil (it's B+ I think), and the 4-way Weatherpak connector in the background goes to a connector coming out of the distributor for the ignition module.
I *think* this is for the tip-in vacuum switch for the lockup converter on a Turbo 350C transmission.
This is a test connector that is normally disconnected. I can not recall exactly how it's used, but it has something to do with the lockup torque converter, probably to visually see when it engages via a test light or something.

Hopefully this helps!

Re: 73-87 wiring diagrams
 

Ok i see all the wiring diagrams but im not seeing the one im needing. Does anyone have the wiring diagram for the electric windows on a 1980 silverado? All im finding is the 82-on diagram. I need the one that shows the driver side double switch with 5 prongs and the passenger side switch with 3 prongs.

Thanks in advance.

Re: 73-87 wiring diagrams
 

Look in my signature. I posted all the 1973-1991 GM Light Truck wiring diagrams except 1981, 82 & 84. 1981 & 1982 are in the back of the service manuals. I don't have an 84 wiring diagram.

Re: 73-87 wiring diagrams
 

Thank you for that. It shows exactly what i was looking for.

Re: 73-87 wiring diagrams
 

Don't mean to jack this thread. I may have missed it, but does anyone have a the factory radio wiring diagram for a 76 half ton? I'm looking for the wires coming from the truck going to the radio. I have 5 wires right now...one plug with two wires (one light green and one black), and another plug with three wires (one gray, one yellow, and one black). I suspect the green and black are for the speaker?

Thanks in advance!

Re: 73-87 wiring diagrams
 

Disregard. I answered my own question!:metal:

Re: 73-87 wiring diagrams
 

[ignore: the thread I referenced did get mentioned]

Alex.

Re: 73-87 wiring diagrams
 

is there a difference between the years of the diagrams like 1973-1977?

Re: 73-87 wiring diagrams
 

There will be some differences as GM improved and just plain changed things. 73-75 has an ammeter in the dash. 76 had voltmeter and mechanical oil pressure gauge, 77-91 has electric oil pressure and voltmeter, 73-82 had floor mounted dimmer and 83-91 on the column... Other systems remained pretty close over the entire 73-91 run.

It's best to get the diagram for your year. They're reasonably small files so download and look a few of them over. 81 & 82 truncated diagrams are in the service manuals combined with the 80 & 83 full diagrams you'll be able to muddle through... '84 the is same way '83 & '85 diagrams should get you close enough to fix the problem.

I'd love to get a couple quality hours with my laptop, sheetfeed scanner, staple remover, and the fullsize GM light truck 81, 82, & 84 diagrams. If anyone in New England, San Francisco Bay area, or the Salt Lake valley has a set I'd like to talk about a short loan. The wiring manuals are stapled so they can be disassembled and re-assembled given the proper care.

Re: 73-87 wiring diagrams
 

thanks for the info. one quick question how about between a Chevy and GMC is it still the same? just difference name? i have a 1977 Gmc pick up.

Re: 73-87 wiring diagrams
 

I am changing cabs from a 1985 chev k10 to a 1982 k20, is there anything that should concern me. I know the wiper switch and maybe the cruise control are different. Hopefully the plugs will be the same.

Re: 73-87 wiring diagrams
 

Does anyone have the diagram for a 1986 c10 instrument cluster without gauges? Trying to figure out what wire number on the cluster connection equals what.

Re: 73-87 wiring diagrams
 

The Electrical FAQ has cheatsheets with this exact information. http://67-72chevytrucks.com/vboard/s...51&postcount=2
The 1986 GM wiring diagrams in my signature will as well.

Re: 73-87 wiring diagrams
 

I have a 1982 GMC 2500 with a 6.2 Diesel in it. I have a question in regard to voltage drops. When i push on the brakes, the ampmeter goes into a discharge. It isn't in the brake lights as i have unplugged the switch and tried it and it still does it. One thing that does happen when this occurrs is the glowplug light comes up real dim and the head lights also dim some. It has a new alternator on it, a new glow plug relay, and I have repaired about a dozen wires with failing insulation on them. THis only occurrs when driving forward and braking.it wont do it sitting still or in reverse. Ive been looking for the cause of this for two weeks and still haven't found anything . Has anyone else ever expierienced this before? The only thing I have yet to replace is the Glow plug controller. Could this cause a discharge like this?

Re: 73-87 wiring diagrams
 

Okay guys, wanna help? I need a Wire Diagram for a 1973 - 1980 then Convert it to a 1989 K20.. I have 3 different trucks in 1 so wiring this to work is pretty hard. I have a I-6 under the hood but cant get a response out of the motor due to something not hooking up right can yall help?

Re: 73-87 wiring diagrams
 

I'll get yall a photo of their work. Its Quiet Funny, But I seem to have Lights, Window Wipers & turn Signals, With Running Lights working Correctly.