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Home » Public Forums » GMCnet » Tail Light Upgrade Wiring Diagram (Tail light, wiring diagram, electrical, upgrade)
Tail Light Upgrade Wiring Diagram [message #229014] Fri, 08 November 2013 23:58 Go to next message
Pryzl1 is currently offline  Pryzl1   United States
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Registered: November 2011
Location: Toledo, OH
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Senior Member
In the process of upgrading my tail lights and using men's mall light sockets from full size GMC vans. Where can I find wiring diagrams to tie in the existing coach tail light wiring to the new light sockets? Would appreciate any help I can get on this quickly since I need to use the coach this weekend -- Sunday PM! Thanks in advance

John 1976 GMC Eleganza II - "The Never Ending Story" Partial Restoration - a work in progress 455cc NW Ohio Member of the GMCMI, GMC Great Lakers Motorhome Club, GMCES and Dixielanders
Re: Tail Light Upgrade Wiring Diagram [message #229017 is a reply to message #229014] Sat, 09 November 2013 00:16 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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Registered: January 2004
Location: Hebron, Indiana
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Senior Member
These are the standard colors for rear tail/ brake and turn signals.

http://www.etrailer.com/question-5059.html

White for ground
Brown for tail lights on both sides
Yellow for left brake/turn signal
Green for right brake/turn signal

Now I'll go look at the GMC wiring diagrams to see if that is what they used on the GMC.

Yes they did. I just looked at the 1975 GMC wiring diagram and they used the standard colors listed above.



Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: Tail Light Upgrade Wiring Diagram [message #229021 is a reply to message #229014] Sat, 09 November 2013 06:46 Go to previous message
Pryzl1 is currently offline  Pryzl1   United States
Messages: 100
Registered: November 2011
Location: Toledo, OH
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Senior Member
Thanks Ken

John 1976 GMC Eleganza II - "The Never Ending Story" Partial Restoration - a work in progress 455cc NW Ohio Member of the GMCMI, GMC Great Lakers Motorhome Club, GMCES and Dixielanders
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