RWDMLD18 Report post Posted August 28, 2009 My 2006 GMC Canyon truck is wired for a trailer. If a long wiring harness is plugged in to the trailer adapter at the tow hitch and than plugged in to the RV tow light adapter, will the truck tail light work? Share this post Link to post Share on other sites
wolfe10 Report post Posted August 28, 2009 The truck is wired for a trailer. If a long wiring harness is plug in to the trailer adapter at the tow hitch and than plug into the RV tow light adapter will the truck tail light work? In a word, NO. You would be BACKFEEDING the Canyon's electrical system. If there is room in the tail light lenses, you can install an additional socket/light that is fed from the RV, OR You can buy a "diode-based" adapter that would allow you to cut into the Canyon's tail light wiring (may void warranty) to use the present bulbs, OR Use separate magnetic-base lights that are totally separate from your Canyon. Brett Wolfe Share this post Link to post Share on other sites
RWDMLD18 Report post Posted August 28, 2009 Thanks, Brett. I thought so, but I had to ask the question. I do have the harness kit that has the additional bulbs. I will install per the directions. Share this post Link to post Share on other sites
