Wiper help needed
Thread Starter
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Freshman User
Joined: Sep 2006
Posts: 29
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Wiper help needed
I need some help figuring out my nonworking wipers.
1991 F150 302 non intermittent wipers.
The voltage gauge is dropping down and there is a humming noise coming from the wiper motor.
The noise is corresponding with the gauge drop.
I replaced the motor today and it didn't fix it.
Any idea what I should be checking next?
1991 F150 302 non intermittent wipers.
The voltage gauge is dropping down and there is a humming noise coming from the wiper motor.
The noise is corresponding with the gauge drop.
I replaced the motor today and it didn't fix it.
Any idea what I should be checking next?
New User
Joined: Dec 2008
Posts: 18
Likes: 0
From: Springtown, TX
Check to make sure something hasn't tangled up in the wiper arms.
Had this happen in my old T-Bird. Bought a new motor and put it in the pouring rain. Still didn't work. Took the plate/vent off under the wiper arms and an old shop rag had tangled into the wiper arms binding them.
Had this happen in my old T-Bird. Bought a new motor and put it in the pouring rain. Still didn't work. Took the plate/vent off under the wiper arms and an old shop rag had tangled into the wiper arms binding them.
Cargo Master
Joined: Jun 2002
Posts: 2,033
Likes: 32
From: Aurora,Colorado
What happens when the power to the wiper motor is disconnected?? Still the noise and the voltage drop??
Cargo Master
Joined: Jun 2002
Posts: 2,033
Likes: 32
From: Aurora,Colorado
I would try disconnecting the linkage--especially if the cowl is still off/loose-and then reconnect the electric plugs and see what happens.
Thread Starter
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Freshman User
Joined: Sep 2006
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Ok I'm confused maybe someone can help me figure this out.
The wiper motor is a two plug and when I unplug the top plug my wipers seem to work fine.
When I plug in the top plug the voltage drops the engine starts running rough and the wiper motor freezes.
And the wipers are intermittent I was mistaken.
The wiper motor is a two plug and when I unplug the top plug my wipers seem to work fine.
When I plug in the top plug the voltage drops the engine starts running rough and the wiper motor freezes.
And the wipers are intermittent I was mistaken.
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Cargo Master
Joined: Jun 2002
Posts: 2,033
Likes: 32
From: Aurora,Colorado
Unplug the top plug and let it rain and let the wipers work. We will have to get back to you and figure out what the top plug does and why disconnecting it doesnt effect the operation of the wipers--per your previous post.
The ground can be checked by taking a DVM-set it for DC voltage and take one side of the meter to the negative side of the battery and the other to the ground of the wiper motor. I dont have a wiring diagram of the wiper motor in front of me at the moment. If the ground is bad-you will see voltage on the meter when the wiper motor is operating. But let someone take a look at the wiring of this wiper motor first-and we will get back to you.
Its going to rain??? Where are you located anyhow??
The ground can be checked by taking a DVM-set it for DC voltage and take one side of the meter to the negative side of the battery and the other to the ground of the wiper motor. I dont have a wiring diagram of the wiper motor in front of me at the moment. If the ground is bad-you will see voltage on the meter when the wiper motor is operating. But let someone take a look at the wiring of this wiper motor first-and we will get back to you.
Its going to rain??? Where are you located anyhow??