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Rear lights on my 85 GMC Sierra are not working at all

The front lights work just fine but the rear lights have nothing. There are half wires under the truck but just stop and connect to nothing. How do I rewire everything? I need easy step by step instructions. I have the blue book and the wiring diagram but I don't understand it.

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  • Contributor
  • 4 Answers

Most old chevy trucks have a plug in on the frame close to the rear of of the truck make sure its not just unpluged .And if you realy need to re conect without any plug just look at the color of each rire and just complete each one.That should be very simple to understand.

Posted on Dec 29, 2012

  • Samantha Dec 30, 2012

    The thing is the wires under the truck dead end and there are three wires in the left and four wires on the right. None of the colors match up, there are 10 different colors of wires heading to the back of the truck.

  • Samantha Dec 30, 2012

    There is no plug. No wires leading tp the rear end. I have located the wiring harness and located two wiresruning along the running board of each side of the cab that dead end. The lines are one red and one orange on each side. . The lights on the rear have nothing connected to them and the appear to have just been installed but no connected. No other lines around. The lines coming out of the lights are green, white and black.

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gandergmm
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SOURCE: wiring diagram for ford windstar 1998

i assume its a 3.8L
http://host-comp.com/281774/va102115.pdf

Posted on Sep 30, 2009

  • 1 Answer

SOURCE: wiring diagram 2003 GmC Sierra

I need wiring digram for GMC 2003 SIERRA . I have the left head light working fine but the right I have no power to it. I have checked the fuses and relaysand so far have not found and broken or frayed wires.

Posted on Mar 06, 2010

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