No wipers
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Freshman User
Joined: Jan 2014
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No wipers
I’ve got an E99 F250 with dead wipers. I’ve tried fuses, relays, wiper motor, and a multifunction switch. No luck with any of it. Where in the world do I start trying to chase this down?
Hotshot
Joined: Oct 2006
Posts: 10,135
Likes: 7,937
From: Texas
Well, next I would check to make SURE I have power or no power at the wiper motor. Maybe you have already done this though.
Mountain Pass
Joined: Nov 2018
Posts: 134
Likes: 6
From: Ohio
My wiper motor on my 09 F250 Super Duty kept blowing the 30A fuse. I swapped it out for a new one from Rock Auto and that fixed the problem. Your sounds like you are not getting power to the motor. You may have to trace with a meter from the start of the wire to the motor to make sure there isn’t a break somewhere along the way.
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Which specific relays and fuses did you "try" (whatever that might mean...)?
Mountain Pass
Joined: Nov 2018
Posts: 134
Likes: 6
From: Ohio
There could be more then the one fuse under the hood also. 12v is the trickiest of electrical systems to diagnose. My best advice is get your tester and start at the fuse block and isolate the wiper motor wire and start following it until you get to the motor and switch. There could be a break at any point along the way from rubbing on the chassis to mice having a field day. I know there is a 30A fuse in the box under the hood but there may be another in the box inside the truck.
Mountain Pass
Joined: Nov 2018
Posts: 134
Likes: 6
From: Ohio
actually no I’m not. Have you worked with 12v systems?
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Hotshot
Joined: Jan 2004
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From: St Louis
Yes, and many others, for decades.
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Hotshot
Joined: Jan 2004
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From: St Louis
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Have you scanned the GEM module for any fault codes?
Can you feel either relay click when an assistant switches the wiper switch from OFF to LOW to High (Ignition in RUN)?
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