R90/6 Headlight Switch

CAPITOLATIM · Jul 18, 2010

Hi, my newly acquired 75 R90 has a non working headlight. A get a highbeam on the flash/pass button but that's it, besides the parking light. A BMWMOA send me two used switches , I install on today but getting the same result and no horn.

The good news is I got the clock and voltmeter hooked up and working...

So two switches, both bad, is there something on the circuit board I should be chasing?

Cheers

Tim in Capitola, CA

20774 · Jul 18, 2010

What about your headlight relay? Seems to me that when this sort of thing happens, the relay is the problem.

skiteach · Jul 19, 2010

Easy enough to test switches with VOM/ continuity tester.

CAPITOLATIM · Jul 19, 2010

Switch Tested OK

I did test the switch with my meter, it was good. How do I test the relay?
Cheers
Tim

skiteach · Jul 19, 2010

Most likely by replacing. I seem to remember a thread about headlight relays recently.

CAPITOLATIM · Jul 19, 2010

Relay was stuck?

I dismounted the headlight relay and removed the hot lead(red) to make sure it was powered, It was when I plugged in back in, viola, the headlights work on both hi and low beams...maybe the relay was stuck. Now IÔÇÖm chasing the horn problem, I tested the horn switch before I installed it and it was working, I notice in the schematics that there a different colored wires for the horn...this is getting to be fun.

Cheers
Tim

gertiektn · Jul 21, 2010

Horn switch is green/black. To the board.. :clap

jim

R90/6 Headlight Switch

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