Which wire is the reverse?

[gbjeppm]

All

I am fitting aftermarket parking sensors to my W163.

Bumper is off and looking at the wiring, I have 2 wires to connects

One to the (and I quote) "anode wire of the reversing light" and one to the "earth wire".

This is what I have at the loom for the rear drivers side light cluster.

Any help gratefully appreciated.

Thanks

Matt

 

[bigbobs cl]

Have you got a test light or voltage meter?

 

[bigbobs cl]

Hard to tell looking at the pics but if that middle wire in the plug is brown then that will be your earth wire. You won`t do any damage trying the wires but my first guess without a metre would be the grey as most of the others look to be used for your towbar.

 

[gbjeppm]

Yes I have both, but the test light is 240 v, so does not seem to light up at all.

How can i test with the voltmeter where do i put the two pins?

Thanks in advance?

 

[gbjeppm]

OK sorted I think, tested with the voltmeter

One prong on the brown, and the other one moving around, but getting 12 v at the lights, 12 v at the brake light when on, and so can confirm that getting 12 v on the grey wire when in reverse.

Thanks Bigbob very much.

So thanks yes Grey wire is reversing light.