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  1. #1

    Default HELP with 7-Way Trailer light plug Please!

    OK here is my issue, I had attempted to replace my 7-Way Trailer light plug on my 99 Suburban do to lots of corrosion and they could not keep a connection ( my left rear trailer light would not come on no longer) when I removed the old unit it was full of rust and corrosion and half the wires came right out once I cleaned up the wires and cut them back some reconnected everything I had the same issue I then re checked my work and connections tried again and now had no tile lights on the burban or trailer I checked all fuses had had a 30 aux fried fixed that but still now tail lights, brakes work and turns work fine I have know idea what the heck I have done any help would be great. Thanks

  2. #2

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    This is a link to a site with wiring diagrams for the connector. Hope it helps...
    http://www.accessconnect.com/trailer_wiring_diagram.htm
    1958 Chevrolet Apache Fleetside Longbed .. 350 with a turbo 350 tranny
    2010 Silverado LTZ 4X4 Z71


  3. #3
    Jr. Engineer moosetags's Avatar
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    Is it now just the trailer tail lights that are out or the Sub also
    Brian McCabe
    Santa Rosa Beach, Florida
    '05 Yukon XL 2500 Quadrasteer
    '11 Silverado 3500

  4. #4

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    Quote Originally Posted by moosetags.com View Post
    Is it now just the trailer tail lights that are out or the Sub also
    Now its all the running lights. Headlights work turn signals work and brake lights work

  5. #5
    Jr. Engineer moosetags's Avatar
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    If the trailer has a good battery on board, take a piece of wire and jump the two contacts on either side of the key lug on the trailer's umbilical. This should light the clearance light and tail lights on the trailer. If it does, the problem is in the tow vehicle wiring circuit. This should be on a separate circuit from the TV's tail lights which has its own fuse. Check the fuse on this circuit. Hopefully, that is it.

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