Lennart

Hi
I have a tricky problem with my wipers, when the engine is turned off and ignition on the wipers work.
When the engine is running the wipers doesn't not work, the wiper motor has 12 volt all the time.

Any ideas about trouble shooting?

Alan 71

Hi L,
I'm thinking that with the engine not running you're opening the wiper door manually to check the wiper power switch in the car.
When the engine is running is the wiper door opening far enough to push the wiper door limit switch which allows the wipers to begin operating?
Without that button being pushed the wipers won't operate.
Regards,
Alan

Lennart

Thanks for your support, but the wiper motor has 12V all the time and it shouldn't if the door limit switch is not activated I guess?

Alan 71

Hi L,
Yes, wiper motor should only have power when the limit switch is depressed.
Does it still have power if you pull the plug on the switch tail?
Regards,
Alan