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Wiper motor wire bubbling.
Topic Started: Apr 20 2016, 01:54 PM (325 Views)
dayle1960
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Fastest Hampster EVER

So the wife drives my son's car to work this morning and when she comes home she states that the wipers "are going slow".

So we take the cowl off, pop the wipers off and remove the wiper linkage and motor assembly so I can grease the pivot points. All goes well until I slap everything together and test the motor.

It does not move!! Kinda like the motor is dead. I hit the connector with some electrical spray to combat the water that I sprayed all over the cowl area.

wiper motor wire bubbling due to water in the wire connector.

http://s1291.photobucket.com/user/twgothrup/media/Wiper%20motor%20bubbling_zpst8iao6vd.mp4.html?o=1



This is the result when I plug in the pigtail to the wiper motor. Bubbling from one of the electrical wires. Never seen that before. I felt the top of the motor and it was slightly warm.

Could I have twisted the linkages in such a way that they have bound up? Could the motor have burned up? Could there still a bad connection in the pigtails due to the water?

This is a 2005 Hyundai Elantra 5 door.

help.
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David95237


Looks like a poor ground. Might have to replace that terminal.
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t3ragtop
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Turbo3 and Twincam Tweaker

the biggest killer of wiper motors is bad brushes. they can wear out, they can wear the commutator until it shorts, or the braided brush leads can short to their holders.

wiper motors are pretty weird. it's one of the few dc motors where a voltage is applied to a set of windings to make the motor run fast while using a reverse winding that gets switched on to buck the magnetic field to make the motor run slow.

all wiper motors that i have ever run across use permanent magnets glued into the motor bell. i have seen a number of those magnets become unstuck and rotate in the bell which causes the commutator to get out of phase resulting in near locked rotor current draw.

anyway, junk yard wiper motors are pretty cheap. ;)
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dayle1960
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Fastest Hampster EVER

Thanks for the replies. I fixed the problem. I turned on the wipers and listened. The motor was trying to turn, but for some reason it didn't. So I took a closer look at the arms which go to the wiper blade stubs. Turns out that I had crossed the two arms and it was not letting the entire assembly rotate in the correct direction. Stupid, stupid, stupid, knowing that something was wrong after taking twenty minutes trying to put the entire assembly back into the hole it came out of. After I straightened the arms, the assembly just slid into the hole easy, peezy.

Once again, thanks.
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