S52 w/ ZF 5 speed Reverse lights

[jjc034]

If you jumped the car side and the lights didn’t come on, then changing the switch will do nothing. Change the fuse, whether it looks good or not, and try it.

If you jumped the transmission side of the plug.....smack yourself..

I deeply regret that I will be unable to smack myself. Jumped the two prongs from the car side and nothing happened. What color are the reverse light wires? Blue/white?

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[jjc034]

Replaced fuse just to see even though the obc and instruments light up and that did nothing.

What should next steps be?

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[pazi88]

Replaced fuse just to see even though the obc and instruments light up and that did nothing.

What should next steps be?

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Use multimeter to figure out where the problem is.

[jjc034]

Use multimeter to figure out where the problem is.

Yeah i need to run a pick it up from my buddy. Will also take a look at bulb contacts in the rear. All the lights are working except for reverse so I doubt it is the 5-pin to Tail connector. Maybe the contact points on the bulb pushed out.

Will send update once I do that and get multimeter tonight

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[jjc034]

Test light confirmed that reverse switch is getting power; however, blue/white wire in taillight assembly is not. Will need to pull liner and take a look at wires. Installed keyless entry under antenna motor but I only tapped into antenna power, brown ground, and lock /unlock wires. Didn't touch blue /white.

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[jjc034]

Update: Tested the wiring all the way to the tail lights and all was sound. Took off the tail light assembly to test the reverse terminal and all of the pins - each pin lit up EXCEPT for the reverse pin. This occurred on both sides. The blue/white reverse wire and terminal are receiving signal from the transmission; however, that power is lost once it touches the reverse pin in the tail light assembly.

Anyone have any advice? I noticed you can take the assemblies apart with the clips, but the middle seemed stuck.

[jjc034]

Did some testing by attaching ground to battery and holding positive wire to each of the individual pins to see which ones lit up... Not sure why this is occurring but would appreciate your help. Seems like the reverse lights are not on the same circuit (excuse my vocabulary if that's the wrong word) as the other lights.

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[jjc034]

Anyone? Should I move this to a reverse light thread?

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[ZekeTheSneak]

This place is so quiet it doesn't matter at this point lol. Your cluster works correct? If not then that's a problem as its on the same circuit as the reverse lights. Leave the ignition on and pop it into reverse. Grab your meter and make sure you get 12v at both pins on the sensor. It's a simple on off trigger.

[jjc034]

This place is so quiet it doesn't matter at this point lol. Your cluster works correct? If not then that's a problem as its on the same circuit as the reverse lights. Leave the ignition on and pop it into reverse. Grab your meter and make sure you get 12v at both pins on the sensor. It's a simple on off trigger.

Yes, I get full power to the rear. Disconnected the switch and jumped the wires.

As shown in the pics above, the issue is that the reverse lights don't seem to be running in the same ground as everything else once power comes in

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[ba114]

Looks like you're runnings LEDs?
Can you take them out and rotate them and reinstall them? Some LEDs can only be installed one way for them to work...

[jjc034]

I tried it but will give it another go to check.

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