911 SC Headlight Washer Relay

[chrispx]

I needed to do a little R&R on my air dam and and since the bumper was off, decided to get the Headlight Washer system working. The pump was shot as was the relay. I've got the new pump and while looking for a replacement relay find that it's an $85 or $90 dollar part. Can anyone suggest a suitable alternative that's a little more affordable?

Thanks

Chris

[porschenut]

Maybe the broken relay can be repaired - it might only require a little soldering.

[LM3929]

Can you post pictures so that the rest of us can follow ( I need to do mine as well)

Thanks lorne M.

[robert walsh]

$90 to keep everything working is a small price to pay, I am doing the same thing and quite frankly it is one of the lesser amounts I have ever paid to resolve a problem that I want restored to the way it is suppose to work.

[ruf-porsche]

You guys do know that the lights has to be ON in order for the headlight washer to work.

LOL Newbies

[chrispx]

Hey Ruf,

Yes , the Lights are on and there is power going to the relay. The problem is that the relay is not switching and putting power out to the pump. Do you have any insight as to why that may be and what can be done? If I've got to drop $90 on a new relay so be it, I was hoping someone here had found an alternative.

Thanks for your help.

Chris

[DavErb]

A second on the request for pictures. This is something on my To-Do list too and it would be nice to have some idea beforehand rather than the usual "voyage of discovery" that so much off my 911 tinkering entails

As far as relays goes aren't they a pretty common Bosch part? Even then any 12V auttomotive relay ought to be able to work as long as its not mated with some sort of specialized connector block.
Thanks

[ruf-porsche]

Originally Posted by chrispx

Hey Ruf,

Yes , the Lights are on and there is power going to the relay. The problem is that the relay is not switching and putting power out to the pump. Do you have any insight as to why that may be and what can be done? If I've got to drop $90 on a new relay so be it, I was hoping someone here had found an alternative.

Thanks for your help.

Chris

You have power to the relay, but do you have power to activate the relay? One wire should always be hot, but another wire should be hot when the headlights are on and the washer switch is turn on. That is the control wire to activate the relay. You can purchase the same relay for a lot less money, but it would be inappropriate for me to tell you where, since the host of this forum also sell the part. Do a little research.

Here's a picture of the relay.

[Gunter]

Porsche used a lot of Bosch relays, is it black and square?
Just noticed the pic by ruf, Hella is good.
Reinigungsteuergerat = Cleaning-Control-Devise.
The relay should show the rating on it, 5WD? I am used to Amps.
Looks like 5-pin.
Take it to an Auto supply, they'll find a replacement.

While you're at it, get a spare relay for the Lambda brain under the pass. seat.
Use dielectric grease on the pins.

[chrispx]

Thanks again
I have power to activate the relay, it jsut won't switch over. It's interesting though, the part I have is different from the one you are showing.

Chris

[ruf-porsche]

Originally Posted by chrispx

Thanks again
I have power to activate the relay, it jsut won't switch over. It's interesting though, the part I have is different from the one you are showing.

Chris

Post a picture of your relay. The relay I posted is the 80-90 bucks relay. 928 618 111 00

[dino_jr]

Hello. / Big Bump

Does anyone have the electrical schematics for the headlamp washers? I too would like to check mine cheers.

[FrankM_]

Originally Posted by dino_jr

Hello. / Big Bump

Does anyone have the electrical schematics for the headlamp washers? I too would like to check mine cheers.

What year is your P ?
I have most of the schematics


Sent from my iPhone using Tapatalk

[FrankM_]

Originally Posted by dino_jr

Hello. / Big Bump

Does anyone have the electrical schematics for the headlamp washers? I too would like to check mine cheers.

As an example, here is the '88 schematic (but certainly the same for most 84-89 models I believe) :

SRA = ScheinwerferReiningunsAnlage (1 word !) = Headlight washer system
Option code M288




- the F5 connection point is to the light switch, terminal 58 where it get the power for the electronics (so, yes, lights should be on to use it)
- the M57 is to the tacho for some reason
- MP I is the ground connection up front where the battery negative cable connects to the bodywork.

You can see that the power for the motor comes from fuse 3, 25A that is also the fuse for the 'cabrio verdeck'.

Happy testing

[dino_jr]

Hi, yes sorry should have said, I have a 1980 SC

[GH85Carrera]

I understand many of the guys want everything to work as designed, or better. I am the same way, and all the functions on my 85 work as designed, or better.

That said, the headlight washers are neat, but likely the least used option on any 911 except seat heaters in a Miami, FL 911.

My headlight washers do work, but they will hose down the entire car. In fact they work as a backup if the windshield squirters fail. In the 26 years and 100,000+ plus miles of driving my 911 in 41 states and Canada, I have actually really needed and used them once. Light rain in Utah, and all the feeder roads to the highway were dirt, or mud roads. Every vehicle that came to the highway brought mud and the rain made a mist of brown goo and the car and headlights were covered in brown layer of mud. I used over a gallon of washer fluid that day.