Windshield Washer Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**JAZ72C10** · 03-09-2026, 01:59 PM

Installed a new original reproduction washer pump from Classic Parts. I tested it before I put the dash back together and the washer squirts fluid on the windshield continuously. It only stops when I shut the wipers off completely. Is the on off switch itself bad? OR is it the new pump? I disconnected the power to the pump itself and it continued to pump washer fluid. The pump also seems to be leaking where the piston enters the pump chamber. Did I just get a bad unit?
1972 c10

03-09-2026, 01:59 PM	#1
JAZ72C10 New Member Join Date: Jan 2026 Location: Northeast Ohio Posts: 9	Windshield Washer Help Installed a new original reproduction washer pump from Classic Parts. I tested it before I put the dash back together and the washer squirts fluid on the windshield continuously. It only stops when I shut the wipers off completely. Is the on off switch itself bad? OR is it the new pump? I disconnected the power to the pump itself and it continued to pump washer fluid. The pump also seems to be leaking where the piston enters the pump chamber. Did I just get a bad unit? 1972 c10 Last edited by JAZ72C10; 03-09-2026 at 04:04 PM.



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