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Wiring Backup Lights

Discussion in 'Chevy Trucks' started by jclodfe2, Dec 18, 2004.

  1. jclodfe2

    jclodfe2 Junior Member
    Messages: 20

    I have installed some 55watt halogen backup lights under my bumper on my 2005 2500HD, but was wondering what color wire I need to be tapping into for the reverse lights. Don't want to tap into something I shouldn't. Thought someone on here might be able to help me out. Thanks

    Messages: 92

    Lots Of Posts On This Subject. I Think It Isthe Light Green Wire On The Trailer Harness.
  3. PackRat

    PackRat Member
    from Kansas
    Messages: 47

    I'd put it on a relay, if it was mine. That reverse lamp circuit isn't designed to hold that much current.

    Besides, then you can switch the ground side of the relay, so they are only on, when you need them. Imagine, trying to back a trailer, with the front, lit up like downtown.
  4. Mebes

    Mebes Senior Member
    Messages: 451

    I Agree.... Do not run aux lights off the factory wires. Use a relay.
  5. Tarkus

    Tarkus PlowSite.com Addict
    Messages: 1,113

    Or even just a rocker switch and use them as needed.
  6. PackRat

    PackRat Member
    from Kansas
    Messages: 47

    I'd even run a relay then, so you aren't pulling all the load through a switch.

    Even better. Run a double throw switch, so you can have them ON, OFF, or ON with the backup lights. Might be kind of handy to have a lil light on the subject, when hooking up a trailer, or loading something.
  7. raptorman03

    raptorman03 Senior Member
    Messages: 333

    Its the green wire :)

    LABPLOWING Junior Member
    Messages: 1

    What Type Of Lights Are They?
  9. Frozen001

    Frozen001 Senior Member
    from Rome NY
    Messages: 908

    If your truck has the HD trailer setup the Revers on the 7-way harness in the back has reverse on pin 7 (The center pin). It runs off its own relay I believe.
  10. jclodfe2

    jclodfe2 Junior Member
    Messages: 20

    Yes it is an HD. The backup lights were bought at my local Auto Zone. I believe they are 55 watt halogen. I was hoping to be able to just splice into the reverse wire on the trailer wiring without having to run wires clear to the front of the truck. Not really important to have them switched unless I am thinking wrong. I just want to make sure I am going to do this right the first time. Thanks for all of the replies
  11. Bad Luck

    Bad Luck Senior Member
    Messages: 741

    I did the same, no relay. If you look under your bumper, follow the trailer connection wires, these will be a sticker wrapped around the wire loom that tells you which color wire is for the reverse lights. I think it was green or blue, I wired mine through the factory wiring. No issues, yet.
  12. jclodfe2

    jclodfe2 Junior Member
    Messages: 20

    Thanks Bad Luck, I will probably end up doing it without putting in the relay. That sounds much easier. Thanks
  13. Mebes

    Mebes Senior Member
    Messages: 451

    Sorry I misunderstood. Just to clarify... If you are going to run them off the 7pin trailer harness wires you should be fine (no relay required).

    If you are going to wire them up to the wire that sends power to the existing lights then you need the relay.
  14. PackRat

    PackRat Member
    from Kansas
    Messages: 47

    If your going to do it that way, put your lights on a receiver tube, with a crossbar, and wire them into a trailer connector. Then you can put them on, or take them off at your convenience.

    Just a suggestion.