Lighting problem

Wasn’t sure where to put this as it’s a BMW related problem, so I’m just throwing it out here, if it gets moved to the correct place, thank you.

My friend just got a 1992 BMW 318 is. There’s a few problems, reverse lights don’t work, the bulbs aren’t burnt out I already checked. When he signals, sometimes when he throws his signal on, on the dash the left arrow stays on and his foglight light turns on, as well as his headlights shut off. Also, when this happens, when he signals right, his right signal works as normal, when he signals left, his right signal flashes, and when the dash light just stays on and the signal is in the neutral position, his right signal just stays on, no flashing. Third problem is his door speakers like to work now and again, it seem to be only after he signals right, but that’s only occasionally. Don’t know if anyone’s got some solutions for this but it’d really help, 'cause he really doesn’t wanna take it to the dealer and pay out the ass for them to fix everything. I’m pretty tech savvy so I can probably fix it if I can get a starting point.

Okay, this shit isn’t getting answered, can someone please move it to a place where it will.

I don’t think you’re going to get many answers on here.

for the reverse lights, check reverse gear sensor.
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