1988 wiper speed
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4wd Low
Joined: Dec 2022
Posts: 14
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1988 wiper speed
Year or so ago, I replaced the switch and module for my wiper as the intermittent side was dead. Maybe used a half dozen time since. Noticed intermittent had failed again a while back. Currently it now only functions at a slow intermittent speed on the high speed switch function. All other switch positions are dead. Which part is more likely at fault?
Hotshot
Joined: Jun 2015
Posts: 12,832
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I had a Napa reman wiper motor that always made a little noise until it would barely move across the windshield. Have you checked for power at the motor in all switch settings? So to narrow it down… it is either the switch, wiper module (which I have never had to replace in 3 different trucks) or the motor.
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4wd Low
Joined: Dec 2022
Posts: 14
Likes: 1
I had a Napa reman wiper motor that always made a little noise until it would barely move across the windshield. Have you checked for power at the motor in all switch settings? So to narrow it down… it is either the switch, wiper module (which I have never had to replace in 3 different trucks) or the motor.
Hotshot
Joined: Jun 2015
Posts: 12,832
Likes: 2,436
That is why you need to do some diagnostic testing to figure out what is wrong. Asking us what part is most likely to be at fault is parts replacing and gets expensive.
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4wd Low
Joined: Dec 2022
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I have worked 128 hours the last 4 weeks. I asking so I can determine which end of the truck to start pulling panels off to save some time and make it safe to drive in the rain. Ambiguous answers are no help.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
There a multiple ways of troubleshooting this problem. Measure the voltage with different switch positions at the motor. Or test the switch. I would start at the switch, but that is just me...
Hotshot
Joined: Jun 2015
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I would start at the motor since the plug is easy to get to.
To me it seems like all the OP wants to know is what part to replace.
To me it seems like all the OP wants to know is what part to replace.
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Hotshot
Joined: Jul 2020
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From: Near Salt Lake City
I would check the ground on the motor first
I use an alligator jumper wire to test the ground, then continue on with switch testing if the ground is not the problem
I use an alligator jumper wire to test the ground, then continue on with switch testing if the ground is not the problem
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Joined: Apr 2018
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From: pine city washington
88 wiper speed
this is the same circut as my 69 f250 hasn't changed much. i think I will go to the junk yard and get a switch and intermittant module and wiper motor and see if it will fit my 69 f250. it will be a nice upgrade.
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