Thread: Slightly different Reverse Light Problem.

Hello. I'm looking for a clue with what i think is opposite to the normal reversing light problems I've read so far. The reverse light stays on all the time...
Brief background -'99 300TDI single cab ute (bugger all modern electrics). Started having problem after I towed a trailer that wasn't wired right. Have checked on-line and they all deal with the light not working. I have tried to deconstruct those problems in reverse to see if there are any common issues without success. Steps so far
1. Disconnected reverse sender in G/Box but the light still stayed on, which has me tossed.
2.Checked cab fuse box nothing out of place there & only 3 relays none of which impact reverse circut.
3. Pulled apart wiring at car side of trailer plug to make sure nothing fused - All good there.
I would assume the reverse sensor isn't at fault because the problem exists even when it's disconnected. I can't find any secondary sensor on the shifter itself (while hanging upside down looking through the floor inspection plate in the cab with a torch) My next step will be a pain - pull the tray off and trace the loom back to power(s).
Any suggestions welcome, especially if they don't involve chasing out the back wiring.
PS when I said light is on all the time, actually only when ignition is on...
Matt

I think you're right Don but I'm buggered if I know how something from the trailer plug triggered it. Or it's a really annoying coincidence.
Disco, the switch is a two pin plug with two wires, so I guess it's more than a simple 'earth out' type switch (could be wrong). It joins into a small wiring loom about a foot from the switch and I don't know where that goes yet. Looks like I will be splitting some wiring and buggering around with the multi-meter. I hate electrics, that's why I love the older Landy. On the plus side, I don't need anyone to plug it into a laptop. Thanks guys.