Winndshield washer pump

[Bustd Knuckles]

Just re assembling my '72 C/10 after inside out paint and got to the point of re installing my wiper/washer assembly. I rebuilt the washer pump and while I had it on the bench I hooked it up to 12volts and all I got from the washer pump was a click. The cam moved but the plunger didn't . Is this as it should be ? I just used the 2 terminals leading to the pump with the 12 volt jump pack. Want to get this operational before putting the rest of the dash together . Any help would be appreciated.
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[68gmsee]

What you're probably hearing is the solenoid releasing the piston to engage the cam on the motor. The wiper motor turning moves the washer piston up and down with a cam and resets it until you push the knob in again.

[LockDoc]

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This thread might help you.

http://67-72chevytrucks.com/vboard/s...d.php?t=413551

Like 68gmsee said the wiper has to be turning for it to work...

LockDoc

[Bustd Knuckles]

Thanks guys,I'm on it.
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[68gmsee]

If you rebuilt the old pump, you will more than likely find out it won't work properly. New imported rubber parts are cr@p. I've tried twice and finally gave up and installed a small electric pump motor under the dush. It's activated when I push the knob in. Only thing is that in order to keep it running you have to keep the wiper knob pushed in. It's not that big a problem here since we haven't gotten much rain lately.