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Headlight washers won't work


laalves

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Can you hear the pump starting? If you think your pump is at fault, according to the repair manual page 1121, you have to remove the reservoir to reach the pump…Never did this job on the TT…. Yes it is behind the left wheel housing liner….

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I managed to order one new pump off ebay for 15€ so before I start disassembling things I have the part on hand. I'll replace it straight away and see if it works. If not, my next suspicion will be the relay which if I try to source it as Porsche's P/N 996.618.113.00 will cost upwards of 150€ but if I source it as Bosch's 1 397 328 015 it'll be 20€.

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  • 2 weeks later...

I got 996 618 103 00 has a part# for the headlight washer relay??? (MY2002) Fuse C9 is the fuse for the headlight cleaners ….

Interesting... The 2010 PET which I used shows this to be 996.618.113.00. I did check the right fuse. Anyway, just got the pump in the mail and will try it tonight.

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Right, just took the tank out (pain in the neck), checked the pump and its plug. The pump tested fine with 12V outside the car, so that was not it. Since I had a new on hand, I replaced it anyway. The plug is the interesting bit: the two contacts are shorted, 0 ohm. When I remove the corresponding relay it reads open circuit.

 

The relay itself, outside the car is shorted between P and 31, which looking at the attached diagram, only makes sense in case of a defective relay.

 

What do you guys think?

996TT02 Wiring extract.pdf

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