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Bad Wipers

gmcsierra93

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gmcsierra93 Enthusiast

gmcsierra93

Posted
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Since the day after i bought my 93 Sierra the wipers are all screwed up. They run all the time. The only way to shut them off is to unplug them from the wiper motor. Now would the fault to this be the wiper switch or the actual wiper motor itself? Thank you for the help.

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

'Could be either. My 79 El Camino would do that after getting the wiper motor control circuit wet (under the hood on the motor assembly). I don't know if your truck and my El Camino share any features.

grimmysnr Enthusiast

grimmysnr

Posted
Posted

Switch or stuck relay. Motor is just a motor its just is just run and run. When it receives a pos and neg signal it goes. I would trace the switch and relay and with a truck at that age its gotta be a relay. Kinda like those signal relays that get stuck when its really cold out or a starter relay that wont engage.

dlewis1111 Senior Enthusiast

dlewis1111

Posted
Posted
Since the day after i bought my 93 Sierra the wipers are all screwed up. They run all the time. The only way to shut them off is to unplug them from the wiper motor. Now would the fault to this be the wiper switch or the actual wiper motor itself? Thank you for the help.

 

Make sure its grounded. If so, replace the wiper delay board.

  • 5 years later...
Gurrzt Enthusiast

Gurrzt

Posted
Posted

it is a circuit board problem.

eddietorn Enthusiast

eddietorn

Posted
Posted

Yes, it looks like a switch or even a wiring issue. Unplugging the fuse might help too. Haven't heard of your case though, it's usually a non-working wiper. I suggest you have a trusted technician take a look at it.

dsr611 Senior Enthusiast

dsr611

Posted
Posted

Control board problem...my 98 did just the opposite. When it was dry, the wipers would work, but a lot of times, wouldn't work in the rain. Researched and found that there was an issue with the control board housing. IIRC, it was not completely sealed and would allow moisture into the housing causing solder joints to corrode. I pulled the housing out, resoldered the joints, and sealed with some silicone caulking/sealant and never had the problem again.

 

 

 

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