Hello!

The repair manual shows 3 electric pumps related to the washer system.

I found a pump in my car next to the battery. What does that pump do? When I attempt to wash the windshield, I hear a pump but the sound comes from near the windshield wipers motor (behind the dash). So I'm assuming the windshield washer pump (green pump). Then what is the pump near the battery supposed to do? I know it's not the pump for the supplemental cleaner, because that one is supposed to be near the RH fender. And I also don't think my car came equipped with headlight washer system. Then what is it and how come it's not on the diagram?


Furthermore, the washer fluid tank cap is supposed to have 3 hoses coming out of it. Mine has only 2. What am I missing?

Also, is there a complete diagram somewhere showing all the hoses, connectors, valves and so on so I can verify my existing system is complete and correct?

As of now I hear the pump under behind the dash working but nothing gets squirted on the windshield.

Talking about 1988 Porsche Carrera Targa

Thanks!

 

My 84 does not have the intensive wash, so I can't be certain on it, but the normal washer tank is located in the drivers side front wheel well and filled through a port located inside the fuel door. the pump at the front should be the pump for the standard washer.

The headlight washer pump would be mounted in the bottom of the washer fluid tank out in the front wheel well, if you had one, but yours may not have been delivered with that system.

It does seem like you should have 3 lines. 1) The pickup line from tank to pump to supply the pump with fluid. 2) a line Teed into the output of the pump returning to the tank. 3)vent line to vent the tank as fluid is used or added. based on the parts diagram it looks like the missing line is the vent, but the drawing may not be that accurate.

I don't know the location of the intensive washer system well, but i believe the tank is mounted next to the brake master cylinder. and the intensive pump is mounted on the intensive washer tank. that would most likely be your source for the pump sound near the windshield wiper system.

 

got it all figured out now. So the red vent line is what I'm missing. On this diagram it appears like it has some sort of fitting at the end but no part number is allocated. What would that be?

Also, is the T (item 19) specially calibrated? Else it might allow too much fluid to return, leaving the nozzles without adequate pressure.

 

Glad you figured it out. Washer system was overly complicated. My former 89 had headlight, intensive, and regular systems. All worked (surprisingly!) The intensive system was pretty aggressive.

None of the Ts are flow restricted or check valves that I recall.

 

I find that pushing the right hand side stalk up to activate the wipers doesn't work...but if I reach forward and turn the **** to the right in the dash that gets them moving!

 

If you have or can find an intensive reservoir, you can massively simplify and use just that with a new pump and you have better pressure and the washer pump and leaks are away from your battery tray area. I also removed the huge washer reservoir in front of the driver wheel well. Very easy change and still using correct parts for purists.

 

I have all three pumps and systems. The intensive washer works pretty well. I use it for bugs and bird droppings if the regular windshield washer (stalk operated) doesn't do the trick. The switch for the intensive washer pump/fluid is under the speedometer. It didn't work when I first bought the car, but after replacing all of the check valves and correcting some of the hoses, which had been bypassed, it worked like a champ.

The fluid bottle pictured as #34 above is still available. I ordered about 10 bottles of the stuff a while back and it is quite pungent. When you refill the intensive washer reservoir (which has the pump connected to the bottom of the tank), make sure the cap is secure. I accidentally left the cap off one time after filling and the next day the reservoir was empty. It evaporated quickly.