Corolla wiper fluid pump


Old 11-18-19, 06:53 PM
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Corolla wiper fluid pump

I replaced a blown up (cracked in half) original Denso wiper fluid pump in a 2008 corolla.
I tested the power to the plug and it tested 12 volts so I purchased a Napa replacement pump. After installation I could hear the pump working but no wiper fluid was coming out of either windshield nozzle. I pulled the hose at the junction and ran the pump, fluid came out of the hose so I know the pump was delivering fluid up the hose. I used a kids medicine syringe to force fluid into the y adapter part and the fluid came out onto the windshield. I disconnected the 2 hoses at the y connector and then Hooked the pump directly into those 2 hoses 1 by 1 and no fluid came out.

I purchased another pump and got the same result

itís a mystery. Either the after market 12 volt pumps donít generate the same flow of liquid as the Denso factory one does? Or both nozzles are clogged but not enough to stop the syringe fluid?

any help or suggestions would be appreciated, I could replace both nozzles? I just canít believe an aftermarket pump canít get wiper fluid to the windshield in a small car like a Corolla
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Old 11-23-19, 07:42 AM
ukrbyk's Avatar
Join Date: Mar 2010
Location: USA/ Pacific NW
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Nozzles are clogged or frozen. happens all the time.
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