Reply
 
Thread Tools Display Modes
 
Old 04-11-2020, 07:15 PM   #1
Junior Member
 
Join Date: Aug 2019
Posts: 5
Help identifying wire plugs in '03 Chevy Express

Hey all, first post here!

I bought an AWD '03 Chevy Express last November and I just started stripping it for my build. It was originally a conversion van with lots of custom stuff running off its own wiring harness. I removed all the custom stuff and unplugged the harness, but as I was stripping I found 2 seemingly stock plugs that were unused. One in the front and one in the back. I was hoping you guys might be able to help me identify them?

The lights in the front were from the custom build and attached to their gnarly harness, so I pulled all that out. I'll be building a custom headliner for the front and want to include a dome light, and I have a hunch that the one unused plug in the front might enable me with that.

I had trouble uploading the pics, so I shared them in this Google Photos album: https://photos.app.goo.gl/wM147TNpr458i3oz8

The big plug is in the front driver side. The small one next to it that's plugged in goes to the map lights on the sun shades. Tried to get different angles to see the color wires going into it.

The other smaller one is in the back near the top tail light.

Any help would be greatly appreciated!!
__________________

aiguofer is offline   Reply With Quote
Old 04-13-2020, 12:06 PM   #2
Senior Member
 
Join Date: Feb 2015
Posts: 174
Take a look at the GM Body Builder Manual, it should show all the wiring diagrams.
https://www.gmupfitter.com/files/med...3_LD_GHVan.pdf
__________________

TeleSteve is offline   Reply With Quote
Old 04-13-2020, 01:57 PM   #3
Junior Member
 
Join Date: Aug 2019
Posts: 5
Oh wow, that's an incredible link!! thanks for sharing!

Unfortunately, it doesn't look like that's got the wiring diagrams... maybe they're available elsewhere on the site. Thanks!
aiguofer is offline   Reply With Quote
Old 04-13-2020, 03:22 PM   #4
Senior Member
 
carringb's Avatar
 
Join Date: Jan 2009
Location: Corvallis, OR
Posts: 4,561
Based on the description of locations, and not having a wiring chart for your van, I'd guess the large 8-pin on the B-pillar is for rear HVAC controls, and the small plug there is for dome lights. Same with the small plug by the rear door. If these are dome circuits, they should have an always-hot wire, since ground is switched for dome lights. The 4-pin connector might have 2 hots (brown?), with one constant ground (for map lights) and one switched ground (for courtesy lights).
__________________
2000 E450 dually V10 wagon
carringb is offline   Reply With Quote
Reply

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 05:48 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×