Rear Wiper and Front Wiper Washer

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09 Oct 2011 10:15 #6416 by babromovage
gallery.me.com/babromovage#100142

Maybe someone who knows can offer some guidance. Two questions.

1. Rear Wiper. Wiper Motor is running but wiper is not engaged. I have attached two pics. Am I missing a part?

2. Front Windshield Washer. Headlight washers are working fine. Front windshield washer motor is running but no water is coming out of the hose. Also, one of the Z connector is broke. Any thought on potential problems? Can I get a replacement Z fitting?

Link to Pics: gallery.me.com/babromovage#100142

Any help would be appreciated.

Thank You,

Brian

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10 Oct 2011 06:17 #6424 by WyattsRide
Brian,
I don't recall the MY of your 928 but on my 85 there are 3 separate pumps. One pump is in the front of the car under the intensive fluid reservoir. The head light washer pump is next to the main fluid reservoir underneath the passenger side wheel liner. The main pump is in the engine bay, attached to the passenger side wheel well. It's very difficult to get to. Both the headlight pump and main pump draw fluid from the main reservoir. The intensive reservoir fluid lines are connected to the main fluid lines if the original set up is intact.

There are several reason why fluid is not being pumped. The pump may be burned up, the holes in the squirters my be plugged with wax, the one way valves in the lines my be broken, the main reservoir may be plugged (common for the metal ring in the tank to corrode and cause this) or maybe the fuses are shot. There are probably more that I can't think of now.

All parts can be bought from our main vendors. 928 R US, 928 International or 928 Specialist.

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10 Oct 2011 07:40 #6425 by martinss

gallery.me.com/babromovage#100142

Maybe someone who knows can offer some guidance. Two questions.

1. Rear Wiper. Wiper Motor is running but wiper is not engaged. I have attached two pics. Am I missing a part?

...

Brian


Brian. If your hatch is closed can you move the rear wiper? In the case of my car I could - it was clearly not connected to the motor drive when the hatch was closed.

The triangular plate (your pic 1) is actually on a spring loaded shaft. It should be possible for you to push it down. What is supposed to happen is for the pin from the hatch plate (your pic 2) to engage in the hole of the triangle. If the two are not aligned the triangle should be pushed down when the hatch closes, but then as the motor moves the triangle it will pop-up and engage the pin when the two are aligned. If they do not engage the wiper will be able to move independently.

A common problem is for the shaft to become corroded and to jamb down. It will not come up and engage the pin. In my case when I disconnected it from the motor it was very hard to turn.

Mine was really seized (second pic here ). I bought a used replacement one. However, while I was waiting for it arrive I soaked the shaft in penetrant and after a couple of days it came free - springing up and rotating as it should.

Since you mention you can hear the motor moving that may not be your issue unless the shaft can rotate but not pop-up.

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10 Oct 2011 10:21 #6427 by babromovage
Martin, My triangular fitting can be pulled up but seems to have lost and spring tension. I will try to lube and see if that works . If not, I guess I will need to find a replacement.

Thank You,

Brian

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10 Oct 2011 10:23 #6428 by babromovage
Rick,

Does it make since that the washer for my head lamp works but not the windshield. Would that eliminate the potential problem of the value at the lower portion of the main reservoir?

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10 Oct 2011 11:57 #6429 by WyattsRide

Rick,

Does it make since that the washer for my head lamp works but not the windshield. Would that eliminate the potential problem of the value at the lower portion of the main reservoir?


It does makes sense that your HL washer works but your Main washer doesn't work. Those are two separate lines coming from the main reservoir.

Since you say you can hear the main pump running, then I would think that there is either a clog in the line, a broken/clogged one-way valve or the nozzles on the hood are clogged. Try sticking a needle in the nozzles on the hood. Then disconnect at the connections under the hood and try blowing through tubes.

Do you have an intensive washer system? Does it work?

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10 Oct 2011 12:14 #6433 by babromovage
Will do. Thanks

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12 Oct 2011 16:22 #6476 by babromovage
Martin,

Finally was able to get the back wiper engaged and working. Thank you for the advice.

Brian

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12 Oct 2011 21:34 #6478 by martinss

Martin,

Finally was able to get the back wiper engaged and working. Thank you for the advice.

Brian


Excellent. Glad to hear it.

As for the pump - another possibility that Rick did not mention is that it is worn. The motor can turn but the seals in the actual pump may be shot so that it cannot build up pressure. I've had that happen on other cars.

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13 Oct 2011 07:34 #6480 by WyattsRide
I've had the main pump apart (the main pump and intensive washer pump are the same) and there isn't much to them. I don't recall any seals really. It's been almost two years since I looked at them. I think I have my old one in the garage so I'll take some pictures tonight.

I still haven't addressed my main washer completely. I plan on that this winter. Right now I just use the intensive washer reservoir and pump to squirt the regular fluid on my windshield (which is almost never!) My head light washers work too, though I never use them either. But it was fun to surprise some people looking at my lights by giving them a little spray! :D

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