Asking how to bench test a windshield washer pump on a 72 Cutlass. Any help is greatly appreciated.

 

Run 12 volts through it and see if it pumps. Or have I missed something?.
Roger.

 

Tested the pump. It was bad. Replaced it with a new pump that is electric and does not run off of the wiper motor cam. Works great.

 

Was it fitted in the wiper motor or is it a hang-off-the-side-universal-type thingie?

 

Hello Rob,

It fit direct on the wiper motor, just like the original one. Looks pretty close to original too! The good part is that it does not run off of the wiper motor cam. It is not mechanical like the old version. This one is electric. The part number is 6-200 I got the pump from Autozone for $26.99 plus Tax.

 

Usually the little valves go bad on the originals.

There's a rebuild kit commonly available with new valves and seals.

- Eric

 

Thanks for the info!
Looks like I will go that route and maybe get a squirter that is reliable as the one in my old Ford!!

 

I did miss something!, can someone enlighten me on how mechanical pumps work?.
Seems the more I learn the more I realise how much I don't know.
I've only come across electric pumps apart from older cars that have hand operated ones.
Roger.

 

The stock mechanical pump causes lots of headaces ont he GM cars.
When you puch the button, an electric solenoid in the wiper motor housing is energized and activates a cam that runs on the wiper motor that runs a primitive pump that relies on little rubber flap valves and seals to push the fluid out the nozzels. It has a hard time sucking fluid from the bottle if the flaps leak enough for it to leak back down. Even when the flaps seal, it has a hard time self priming.
I have a "new" wiper motor in my 72 but the washer never worked so i do not know how well it does work when it works......

This electric pump conversion is a small water pump that is all self contained and can self prime much better than the stock mechanical ones.

 

When it does work, it works fine. I've had quite a few of these that worked without problem. I also had a '75 Supreme where no matter what I did, it would not work. I am having the same problem with my '68 (you might remember my thread on that a year ago or so) and I am very interested to try this new pump too!

Thanks for the tip jbestic.

 

Thanks Rob.
Seems like a complicated way to achieve not much, did the designer of it work for Citroen sometime?.

 

I've always thought the same thing.