headlamp wash relay

[gm997_1]

Fellas

Anyone else think like me that the above relay would be a lot simpler and more efficient in use with the timer bridged (taken out of the circuit) so that it doesn't function?
In other words, the headlamp wash feature would work in the exact same way as the windscreen wash does - always on when you operate the stalk. You would then hold it for a second or two to squirt. And you could do it again for the next push of the stalk if you wished too, not have to wait for the 3rd push.

I'm looking to see if anyone has found an alternative non-timer relay so that it can be exchanged for the timer relay.

This principle is very much like the one where you can exchange the rear windscreen wiper relay for the 'regular' relay with 53 stamped on the top. The one used for umpteen functions around the fusebox. Where you then have a single-wipe function instead of 3.
But I don't know if the pins match up for that to be a solution for the headlamp wash.

Anyone swapped that relay over in this way[8|]

Graeme

 

[T911UK]

Anyone actually used the headlight wash?[]

 

[szklarek]

Only by accident!

 

[Dekker]

It is an MOT requirement if you have HID's fitted

 

[szklarek]

I also thought that, strictly speaking, with HID's you needed to have auto levelling fitted? Which, in the case of after market HID's being fitted, isn't going to be the case.

However I suspect missing headlamp washers would be more obvious than missing self levelling!

 

[Dekker]

964's have a self leveling system, I thought the 993's would have had one too.

 

[gm997_1]

Self-levelling in 993s if the HIDs are factory-fitted otherwise it's manual levelling via the dash. (Automatic or manual, I suppose).

Similar idea, automatic or manual, with the relay i'm on about. Factory-fitted relay = one push, let go the stalk and you get a timed duration of squirt and then you wait a short duration, otherwise it's manual squirt for as long as you press the stalk with the replacement relay I'm looking for.

It all depends on whether there's a replacement relay out there with pins that match up with the factory-fitted one, covering all the same functions as it, less timer, as the windscreen wash already works in this fashion so that's no problem.

 

[Dekker]

My mistake 964's are manual leveling, my MOT guy wasn't concerned about this, he was about the washer though.

If the relay is duff you could remove the top and check if there's anything obviously wrong. Dry joints are a favourite as are corroded or dirty contacts on the relay. I doubt the timer part is very sophisticated.

 

[vitesse]

If you PM me(if it's working) or give me an e-mail address,I can send you 2 good articles:-1 about relays & testing & a Bosch data sheet giving all the codes & connections found throughout a car-whatever the make as they are common throughout with circuits--ie all those funny nos like 15,85 etc on circuit diagrams & on relay bases

 

[T911UK]

Relay looks like this;

R43 in front fuseboard, looks a little tricky though!

 

[gm997_1]

Thanks a lot fellas so far.

Yeh, I'll be pulling the top off at some point sooner or later to see inside the relay itself. Am hoping if the regular '53'-no. relay can't be substituted for this one in question, that I could solder a jumper across the terminals responsible for the timer and then it's taken out of the circuit - sorted.

May be not as simple as that of course ...

While I'm in there, I'll pull one of the '53' relays to see the pin configuration at least. I suspect they aren't the same as this one at 43 as there's more functionality covered by this relay.

Anyone tried this swap already?

 

[T911UK]

Did you see the photo in the link I posted?

Pins are nothing like the old 53 relay, bridging the timer sounds the way to go!

 

[vitesse]

Graeme,

If you send me an e-mail at colin.appleton@bruceandhyslop.com,I can send you the link to a good treatise on relays & how to check them plus a Bosch data sheet giving all the contact nos which are common to all relays

plus a Bosch data sheet giving all the contact wiring nos common to all cars & what they connect to and control inc relays.

I found it quite helpful in conjunction with the Porsche current flow /circuit diagrams.

 

[gm997_1]

Yes, thx, saw your photo, T911.

Sure, the pins are different as expected. Haven't even got started on this yet as I was nowhere near the car / email for the last few days, and what I'mstill wondering is whether the 5th pin on this no-43 relay is the timer. Will get down to popping the relay cover off at the earliest opportunity and that'll help...

Thanks, Colin. Emailed you.