Cab electric roof - testing speed sensor input?

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stew72
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Post Sun Mar 04, 2012 2:22 pm

I'm working through the electrics on my roof, so far I know all the micro switches work although the ones on the main motor my need adjustment. So far I can't make anything work but before I blame the control unit I'd like to rule out the speed sensor input. Can anyone give a pointer on how to test this?
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stew72
E30 Zone Regular
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Posts: 653
Joined: Fri Dec 02, 2011 11:00 pm

Post Mon Mar 05, 2012 1:15 pm

Can anyone help?

All I know so far is that there's around 4 volts at the input into the control box when the car is stationary, is that right?