Rear Wiper Relay
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Rock Crawling
Joined: Feb 2014
Posts: 416
Likes: 41
From: Berks County, PA
Rear Wiper Relay
My rear wiper won't complete a full cycle before the relay clicks and stops the motor which parks the blade in the middle of the rear window. Imagine I need to replace the relay responsible for the intermittent function for the rear. Anyone know which one it is?
Camel Trophy
Joined: May 2016
Posts: 3,969
Likes: 859
From: Britainistan, UK
I’d start at the switch on the dash to make sure you have a secure electrical connection. Or swap the switch with another switch from the dash to verify if it is or isn’t a bad switch. Check the pivot point on the rear motor to make sure the wiper arm is tight and not loose. Have someone move the rear wiper arm when you press the switch. Sometimes that helps unjam the sticking motor.
For the relay, check the auxiliary circuits relay, R7 under the bonnet. Fuse 18 in the cab is the rear wiper motor fuse.
For the relay, check the auxiliary circuits relay, R7 under the bonnet. Fuse 18 in the cab is the rear wiper motor fuse.
Last edited by JUKE179r; Aug 7, 2018 at 09:15 PM.
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Rock Crawling
Joined: Feb 2014
Posts: 416
Likes: 41
From: Berks County, PA
Thanks. All the mechanical bits are sorted and the motor has power so I'll try swapping R7 to see if that makes a difference. I'm thinking the BCM may have some role in this mystery. Seems the rear wiper relay does not stay energized long enough to allow the complete back-and-forth motion of the wiper arm. Possible it could be the motor, and I have a spare so I might try replacing that if R7 is not the culprit.
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