Phoenix8990

I have a 69 Cutlass, the wipers work but not the washer. If I press the button the wipers start but no fluid. I have 2 extra wires in the area of which I believe the yellow should go to the pump but I see no place for a connection. I have attached a picture.

Fun71

The pump is a mechanical device attached to the wiper motor. There is an electric solenoid that engages the pump operation, so if that is not being energized, the pump won't operate.

Pull the cover off the pump so you can inspect it and see what's going in in there.

RandyS

I'm thinking that the green wire needs to go away, and the taped yellow wire would attach in it's place.

Yellowstatue

Maybe the green wire goes to a switch under the dash for manual operation.

Fun71

Let's review this. When you activate the washers, do you hear anything, such as clicking or other mechanical noise?

If yes, that could indicate the washer pump is trying to engage or is moving but no water is being drawn through the hose from the reservoir. In that case you may need to prime the washer by disconnecting the hose from the washer end and drawing (siphoning) water into the hose from the reservoir.
Another possibility is the rubber check valves in the pump are leaky and need to be replaced.

If there is no sound when the washer is engaged, it's time to check the electrical connections to make sure the washer is being energized properly when the switch is closed.

Phoenix8990

I'll dig into it more today, thanks for the responses. It hadn't occurred to me that it may take a bit for the pump to get primed. I'll also try swapping the wires. And yes I have a clicking sound but I'll have to listen carefully as it may be linkage.

Steve

matt69olds

Dorman use to offer a rebuild kit for the washer pump. If the washer click when activated, the. You know they work electrically. Hopefully it’s just a matter of getting the washers primed so they pump

Phoenix8990

Well, it clicks all the time. Even with all 4 loose wires disconnected, green, black, and 2 yellows. Obviously I have 2 extra wires for something. I gather it should only click when trying to pump washer fluid?

Steve

matt69olds

I have a 69 book at home, I’ll try and take a decent pic later.

I can’t blow up the 71 wiring diagram photo that’s in the sticky well enough to read on my phone. If I remember right, yellow is power to the wiper motor, and power to the washer solenoid coil. The blue wire should show a ground when the washer button is pushed.

Yellowstatue

Sometimes the three small rubber valves stick from sitting and if you remove that part with the hoses it can be checked easily.

Phoenix8990

Well I got the wiring straightened out. It now clicks only when the washer pump is working then turns off. Unfortunately no fluid comes out. I primed it, NG. I removed the cover where the 3 lines connect and there was a bunch of dirt and dust in there. I cleaned it up but still not working. I would think that the o-rings have gotten hard and I'll need a rebuild kit. Any other thoughts?

Steve

Phoenix8990

I also have a green and yellow pair of wires that appear to come out of the WW motor or from behind it. Any clue as to what they are for?

Steve

Vintage Chief

1971 Original GM Oldsmobile CSM Wiring Diagram A Body "V-8"

BackInTheGame

I am following along. I have the same issue on my washer fluid pump on my '68. I've already rebuilt it, and replaced all the hoses. I believe it is OK, electrically; it clicks appropriately and I've seen the pawl engaging when the dash button is depressed. No fluid ever hits the windshield, nor is drawn into the intake line. The only thing I have not done at this point is to prime the pump and the hose from the reservoir to the pump.

Phoenix8990

As far as priming the pump, I took the hose off at the wiper motor and sucked on the hose until fluid came to the end, I'm wondering if I should get a dropper and put some in the hose connections in case the o-rings are just dried up?

Steve

72455

I've been following your thread and had the same issue on my '72 Supreme. After a week of troubleshooting and scratching my head, I just replaced the whole unit. Something to think about...
https://www.ebay.com/itm/68-69-70-71....m46890.l49286

BackInTheGame

In reviewing the CSM, CH 12B (for 1968) I see two additional possibilities. 1) there is an O-ring within the plastic pump body/cylinder - that could be cracked so it does not draw vacuum/fluid, or 2) Maybe a PO had the mechanism apart and did not reassemble the CAM and Drive Gear Pin correctly.. I may uncover other tidbits as I review the CSM in between Work From Home activities

Koda

It's also worth noting that these work 20% as well as modern ones even when they are working.

Fun71

This is what the washer pump rebuild kit looks like. $6 at the local auto parts store.
https://shop.advanceautoparts.com/fi...pair-kit.c9134

Phoenix8990

I'm on my way, $5.99, that's great, OPGI and Fusick both want $20. I'll post results.

thanks

matt69olds

If you want it to work perfectly, install one of these. Leave some hoses connected to the factory pump, mount this one out of sight, problem solved.

https://www.google.com/shopping/prod...:1,prmr:1,cs:1

BackInTheGame

That's cheating, LOL!

Phoenix8990

That's a thought, I'll see how pathetic the original is, if I can get it to work.

DTencza

not sure if anyone will see this, but I put a new pump in from OPGI. 72 Cutlass S, no hidden wipers. Does that make a difference? I can’t seem to find a pump that doesn’t say “for hidden wipers”. When I put in the new pump, it made a pretty good clicking noise. Is that normal? Fluid did come out but wipers would turn off with the car on.