RPetty2

Trying to organize my wiring a little bit, wish me luck, what's is this tho?

Lizard928

Tail light controller, it bolts to the map tray.

RPetty2

What's a map tray?

Lizard928

the tray that is missing on your car. It sits below the glove box.

depami

https://rennlist.com/forums/9816701-post1.html

MainePorsche

Also will sense, and inform, if a sidemarker goes out.
It says Lamp Controller in German on it.

RPetty2

Side markers work, says tail light is out when it's not, the only thing out is my reverse lights

MainePorsche

How's your third brake light ?

depami

That would set off brake warning not tail.


Check that bulbs match. Not only wattage but brand and age.

Better yet, change them in pairs (or sets if more than two, e.g. brakes).

James Bailey

Fancy relay with self diagnostic features too high a resistance due to wrong bulb or poor connection corrrosion and it throws a fault code. Start by changing bulbs cleaning the contacts at the base of the sockets.

rgs944

You likely have at least one bad tail socket or both. Do a search for Napa tail light sockets for a low cost replacement. YOu need to modify them a bit but it is really simple.

RPetty2

It works haha

sendarius

Re: Third brake light

That may be the problem.

Isn't there a different (.10?) version of that controller for cars with the third brake light?

depami

Again that would be a brake warning, not tail warning.


Before you start hacking into you wiring harness, I would get some Deoxit and new bulbs and see where it goes from there.