Quote:
Originally Posted by Clavurion
Like i said on my earlier post if the wipers with normal wiper activation are doing a full sweep and stopping in the correct end position that switch is working correctly. So there is no need to investigate the switch.
In this case that signal is not routed to rain sensor correctly. So the rain sensor does not know if the wipers are still sweeping or in the neutral rest position. Measure the voltage and resistance to ground on that rain sensor pin 4 (brown/green wire) and see if the values change according to wiper position. Then if needed check the continuity from that pin to wiper motor switch and body module (GM3).
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I was able to check the voltage by back probing pin 4 with the positive and back probing pin 2 with the negative. With the wipers parked I get reading of 9.8 volts. When I operate the wipers on demand with a single wipe the voltage drops down to 0.5 volts then returns back to 9.8 volts when they stop. I tried to measure the ohms but multimeter wasn't able to pick up anything, it just gave a reading of 1.