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Likely cause of fuse blowing when wipers are on LOW
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rlutterb
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PostPosted: Thu Feb 12, 2015 1:50 pm    Post subject: Likely cause of fuse blowing when wipers are on LOW Reply with quote

What is the most likely cause of fuse blowing when I put my wipers on LOW. Running them on HIGH works fine, but on low, when the arms have moved all the way left and are just starting to jump back to going to the right, the entire electrical system of the car blinks off for a second, then the next time the fuse blows. Is it most likely the switch, wiper motor, or is there a wiper relay?
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Greg in GA
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PostPosted: Thu Feb 12, 2015 1:54 pm    Post subject: Reply with quote

since it's not instantaneous, I'd say it sounds like the fuses are blowing because of a high load on the wiper motor. May need cleaning. Others will chime in to support or disagree with my hypothesis.
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TomWesty
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PostPosted: Thu Feb 12, 2015 2:16 pm    Post subject: Reply with quote

Greg in GA wrote:
since it's not instantaneous, I'd say it sounds like the fuses are blowing because of a high load on the wiper motor. May need cleaning. Others will chime in to support or disagree with my hypothesis.

X2
Highest mechanical load would most likely be at either extreme of travel. A good full removal of shafts to clean and lube would do wonders. Maybe scribe things before removal so they align on replacement.
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sodbuster
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PostPosted: Thu Feb 12, 2015 3:00 pm    Post subject: Reply with quote

TomWesty wrote:
Greg in GA wrote:
since it's not instantaneous, I'd say it sounds like the fuses are blowing because of a high load on the wiper motor. May need cleaning. Others will chime in to support or disagree with my hypothesis.

X2
Highest mechanical load would most likely be at either extreme of travel. A good full removal of shafts to clean and lube would do wonders. Maybe scribe things before removal so they align on replacement.


Yep! All of it! Arm shafts binding through their travel have long been notorious culprits when it comes to troubleshooting wiper problems. The more severe the bind the higher the load potentially on the motor.
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rlutterb
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PostPosted: Thu Feb 12, 2015 5:27 pm    Post subject: Reply with quote

Interesting.....I had not considered that sine the arms paper to more freely and without any resistance.
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grandpa pete
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PostPosted: Thu Feb 12, 2015 6:51 pm    Post subject: Reply with quote

x3...clean and replace o rings .
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