E30 Roof mounted OBC.

Post Fri Mar 10, 2017 9:10 pm

Got a 1986 320i Coupe, it has a roof mounted on board computer, with a check button. But it doesn't seem to work. Any ideas on what could be wrong. Thanks.

Post Fri Mar 10, 2017 9:54 pm

How exactly does it not work?

Post Sat Mar 11, 2017 9:50 am

None of the lights light up, i press the check button and nothing happens. I have tried it after running the car for 15 mins and when its not been ran.

Post Sat Mar 11, 2017 9:53 am

Probably unplugged by some previous owner who was too lazy/thick to sort out a problem keeping one of the LEDs on.
Pull it out and see.

Post Sat Mar 11, 2017 11:56 am

Or maybe the brake light warning was constantly coming on!

Post Sat Mar 11, 2017 2:32 pm

Haha possibly, the ABS light is on the dash. Will have a play around with it. I haven't seen a roof mounted OBC before, is it common for them

Post Sat Mar 11, 2017 2:59 pm

All 320i's and 325i's had Check Control as far as I'm aware.

Post Sat Mar 11, 2017 3:09 pm

Thank you

Post Sat Mar 11, 2017 5:20 pm

Just popped it out and is there only supposed to be one main plug? There's 4 holes in the back which look like for bulbs but there's nothing else there.

Post Sat Mar 11, 2017 5:32 pm

It's powered by one multi pin plug. The empty bulb holes are for a seat-belt warning light amongst other things and were only used on U.S cars as far as I know.