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Help! My 2004 Trailblazer windshield washer pump runs nonstop, even with the key in the off position. Swapped relays and that didn't make any difference. Any ideas or suggestions on what could be the issue?
 

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The relay is controlled by a logic board hidden inside the front wiper motor assembly. Sometimes it gets corroded by being exposed to drippiness from the open hood, and there were some TSBs that involved better sealant. You may need to swap the motor assembly.

I assume the washer motor stops when the relay is out?
 
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