85 Volvo COE
New pump
Lines are clear - tested with air from compressor. Air blows through
Reservoir is full
Will not spray fluid onto windshield
3 shops are stumped
Please make it make sense
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 85COE, Dec 9, 2022.
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Is polarity reversed on the pump and running it backwards?
MAMservices, lester, austinmike and 5 others Thank this. -
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The electric going to the washer pump. If the wires are hooked backwards the pump will run in reverse and flow the opposite the way it should.
austinmike and Oxbow Thank this. -
I failed to.mention it is air-powered
Old school truckOxbow Thanks this. -
I think it would be easier and cheaper to just wire in an electric pump.
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austinmike, singlescrewshaker and Oxbow Thank this. -
Only thing that comes co my mind is vent in reservoir plugged, but you should see something prior to vacuum lock.
singlescrewshaker Thanks this. -
I had one go bad where when I depressed it to spray fluid, air come out the weep hole in the bottom, instead of the line going to the reservoir.. Wipers still worked though..Flint1 Thanks this.
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