Re: Rear wiper motor relay - RRC
> My rear wiper isn't working. I bought a replacement motor from eBay
> but its slightly different. how annoying. However I now think that it
> may be the relay that is at fault.
> Armed with my multimeter, it appears there is a constant 12v coming
> down the wire to the motor when the ignition is on. Surely voltage
> should only appear when the rear wiper button is pressed.
It needs a permanent feed (when the ignition is on) to allow the motor
to park. There's a set of contacts in the motor.
> Does this mean that my relay is faulty? apart from swapping it, is
> there any other way of testing a relay? Relay part is PRC7404. Dont
> want to have to pay £30 odd if its not the fault.
> 1992 RRC Vogue SE
I hope that the old motor wasn't just suffering from seizure of the
output shaft - that's usually fixable.