Windshield washer pump

[HO455]

Originally Posted by 67ChevyPickupMan

The motor doesn't come on at all when I push the button, almost like it's just burnt out from years of use or corroded from sitting unused. The wipers do work when I turn the switch, and when I press it in for the washer and wipers. Is there a fuse for the washer motor that could be bad?

Thank you

Wait, wait, wait! The factory washer pump won't operate without the wiper motor turning. The pump is operated by a cam on the wiper motor. (See photo #1. The arrow points to cam) this is why the washer pulses instead of spraying a constant stream.

Second photo red arrow points to linkage the cam operates in moves in the direction of the green arrow. Drawing water into the plastic piston on the left side then expelling it back out to the spray nozzles on the cowl.

Thanks to VetteVet for use of the photo. From this thread.

http://67-72chevytrucks.com/vboard/s...d.php?t=555362

[67ChevyPickupMan]

Originally Posted by HO455

Wait, wait, wait! The factory washer pump won't operate without the wiper motor turning. The pump is operated by a cam on the wiper motor. (See photo #1. The arrow points to cam) this is why the washer pulses instead of spraying a constant stream.

Second photo red arrow points to linkage the cam operates in moves in the direction of the green arrow. Drawing water into the plastic piston on the left side then expelling it back out to the spray nozzles on the cowl.

Thanks to VetteVet for use of the photo. From this thread.

http://67-72chevytrucks.com/vboard/s...d.php?t=555362

That I did not know since this truck never had good hoses to try the washer system prior. I just assumed it was like another truck we have where it's an actual motorized pump. With that I'm going to redo the hoses and give it another shot, and will update afterward. The new pump is still different so if the old one doesn't work I may have to try rebuilding it, even though theres some back and fouth about that.