Ducman82

which plug was that? front or back?

Mrmerlin

if one of the sensors on the MC isnt working then they should both be replaced

pokegama

On my 81 the stop light warning on the dash stays lit until I press the brake pedal. Could it be something to do with that?

docmirror

No, that's part of the POST test. All 928s do that.

docmirror

Grounds are next. But I think you have a crappy bulb control module.

Ducman82

ya thats what im guessing. im going to try to find another one, if i cant, snip snip on the light wire~! does one of the sensors on the MC tell it to turn off after you press it? if so what one, that way i can unplug it or jump it or something.

tailpipe

I just unpluged one mc sensor at a time to see what one worked and what one did not BUT if your going to replace one replace both they are cheap and if one has failed the other is prolly not far behind they can be bought new at most parts stores they are the same as early 80's VW rabbits

Ducman82

sweet. i will play with that tomorrow.

BIMMERMIKE

When my 'stop lamp' stayed on after replacing numerous bulbs,cleaning contacts and such, I traced the problem to a defective headlamp on/off switch. Replaced with new unit purchased from dealership and no problems since!

Ducman82

the headlight swtich?

BIMMERMIKE

YES! try moving/wiggle side to side and see if stop lamp goes out . The contacts wear out, I first replaced with used one which helped then same issue. You may want to fisrt try replacing with known good unit.

Ducman82

huh, wow. so i know this might be a dumb question, but when it says STOPLAMPS it means brake lights right. just checking..

BIMMERMIKE

I believe all lights.............

Alan

No - stop lamps means stop lamps (brake lights in other words). There is a seperate warning for the rear marker lights.

No other bulbs are monitored by the system.

If you don't know the answers - guessing doesn't help anyone...

Alan

BIMMERMIKE

Thanks for clearing this up.