front windshield washer pump not working

2017 GMC ACADIA
40,000 MILES • 3.6L • 6 CYL
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DAVE742X
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No power to front washer pump. The fuse is good. pump bench tested and is good. where else should I look? fuse is good bench tested and pump works no power to pump.
Apr 18, 2020 at 2:26 PM
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STRAILER
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Hello,

There is a washer pump motor relay (k6) that needs to be checked. here is a guide to help you with the relay location and the washer wiring diagrams so you can see how the system works:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Make sure there is power at fuse #20 as well. Here are the fuse panel and relay locations Check out the diagrams (below). Please let us know what you find.
Apr 18, 2020 at 6:57 PM
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DAVE742X
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Hi Ken, the relay checked out okay, fuse still good. I pulled the washer assembly switch out of the steering column, very difficult to check the voltage with a test light. plugs are tight. what should I be getting for a reading if all is good? I used battery voltage to bench test pump and it worked, but was wondering if the voltage at the switch should be 12?
Apr 22, 2020 at 7:08 AM
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DAVE742X
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I was wondering about the BCM I guess I answered my voltage question, I am thinking wiper switch in the steering column. I think BCM would have more issues than just washer pump. any other ideas Ken would be great. your diagrams were you sent were great!
Apr 23, 2020 at 4:34 AM
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STRAILER
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Sorry for the slow response. There will not be 12 volts at the switch it is a low voltage system which controls the BCM which in turn gives 12 volts to the motor. The best you can do with the switch is make sure there is continuity when the switch is on. If so I would replace the BCM here are the instructions in the diagrams below. Check out the diagrams (below). Please let us know what happens.
Apr 25, 2020 at 11:11 AM