The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-23-2020, 09:27 PM   #1
Jonny Hotnuts
Registered User
 
Join Date: Oct 2017
Location: Corbett Oregon
Posts: 116
Easy wire question

(*easy for someone!)


70 C10 2wd with 250.

I am lengthening my harness from the firewall bulkhead connector because I did a smooth firewall and needed to re-route the connector.

Within a year I am dropping in a LS3 and will use a different harness for that engine but for now I am skinning the cat by stretching the harness.


Here is the only thing....

There are 2 identical purple wires, both are going into the same basic area on the bulkhead connector and are the same gauge.

One could assume these wires are likely the same so it wouldnt matter if they were connected a-b or b-a. But the fact is Ive got burned (no pun) assuming electrical 'should' go. I have also seen wire striping where the stripe degrades over time.

So the 2 purple wires (about 14g) in the connector.
Anyone know what they are for and does it matter if they are a-b or b-a?

~JH
Jonny Hotnuts is offline   Reply With Quote
Old 08-24-2020, 12:43 AM   #2
mr48chev
Registered User
 
mr48chev's Avatar
 
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,708
Re: Easy wire question

Looking at this 68 GMC diagram that I dug out earlier for someone else ( the only difference should be the quad headlights) The two 14 gage purple wires go to the park lights

Track back from the park lights. The wires should come out of that spot on the bulkhead plug though.

If you save it to your computer you can expand it so it is easier to read.
Attached Images
 
__________________
Founding member of the too many projects, too little time and money club.

My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
mr48chev is offline   Reply With Quote
Old 08-24-2020, 12:48 AM   #3
mr48chev
Registered User
 
mr48chev's Avatar
 
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,708
Re: Easy wire question

Here, in living color the 70 C 10 front half diagram
Attached Images
 
__________________
Founding member of the too many projects, too little time and money club.

My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
mr48chev is offline   Reply With Quote
Old 08-24-2020, 11:00 AM   #4
Jonny Hotnuts
Registered User
 
Join Date: Oct 2017
Location: Corbett Oregon
Posts: 116
Re: Easy wire question

Thanks, that was helpful.

~JH
Jonny Hotnuts is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:52 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com