No reverse lights??
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New User
Joined: Nov 2003
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No reverse lights??
Hello all, I am new here and have a minor problem with my new truck. I have no reverse lights. I was wondering if anyone had a schematic that showed the entire reverse light citcuit. Basically, I have power going through the fuse, but where it goes from thereI am not sure. I am assuming it goes to the tranny where it then routed to the lights and the trailer backup relay when placed in reverse. However, there are 3 plugs on the tranny and I am not sure which one is for the reverse lights. Any help would be appreciated. Everything else works, just no reverse lights in the tails or to the trailer light relay(hence no power to the trailer plug center pin)
Thread Starter
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New User
Joined: Nov 2003
Posts: 2
Likes: 0
Turns out it is the Digital Transmission Range (DTR) sensor located on the drivers side of the tranny. It's basically a fancy Park/Neutral safety switch. Anyway, pin 9 of that, LB/PK, is 12VDC from the fuse panel and then goes out pin 11, BK/PK, to the trailer reverse relay and backup lamps. Cost is 51 dollars and change at the dealer.
