Hi All
We have a problem on our 2004 STR in that the wipers do not work at all.
Powering the wiper motor directly shows all is ok with that.
When we plug it back in the motor seems to get a reset to the park position and they park. The problem is no other functions work at all.
The hi/lo speed relay R6 clicks when operated, but nothing is engaging the park relay R16.

Before somebody corrects me, we seem to have one of the odd crossover models for this year. We have no relay in R15 at all, but we do have R16 the park relay.
Its the same wiring as Jerry has in post 14 of this thread. https://www.jaguarforums.com/forum/s...t-park-105953/

Looking at the 2004+ wiring diagram (its all I have close to year) we have no signal getting to pin 2 on R16 so it does not engerrise.



Please can anybody advise or suggest where to start?
Thanks in advance.
James

 

Are you sure it's not a turn signal switch problem on the column?
Have the wipers ever worked?
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Hi
I am not sure how this could be a turn signal problem, the wipers are on the other stalk on the column.

We have had the car 3 months and they never worked for us. We have been slowly working on it and most of it works now.
All other column switches are working.

Totally confused about what this could be.

Any ideas more than welcome.
Thanks

 

OK, Here is an updated plan.
When we got the car there was a "spare" steering column in it (a previous owner must have suspected the same. We have removed the entire switch stalk assembly (as 1 unit - both sides), and we are going to swap it out with the one on the car. See what happens.
What is odd to me though is the wiper speed relay engages depending on the position.
Update in the next day or so.
Cheers

 

Oh, then he probably meant it could be a problem with the wiper switch. That's what I'm thinking.

Looking at your wiring diagram, the electromagnet coil in R16 needs to be energized for the wipers to operate normally. You've got battery power available at all times at relay terminal #1. The GECM provides a ground at relay terminal #2, and you're saying this signal is not present.

Before digging too deeply, have you tried replacing R16 with a known-good relay? If your fog lamps work, R11 would be a good donor. I mention this because it's possible the GECM needs to see continuity through the relay's electromagnet coil before providing the required ground. This is just a guess, but trying a known good relay should quickly rule this out.

Is the GECM bad? Not very likely, and I'd put that WAY down on the list of possible faults.

If a known-good relay at R16 is no help, check the relay sockets. If loose, they may not be making a good connection. Look at the old relay for any discoloration on the prongs, a sign of overheating due to a loose fit. Get a small piece of sheet metal the same thickness as the relay prongs, and cut it to the same width. You now have a little test gauge to make sure each socket grips tightly. Don't just test by trying the entire relay, because if only one socket is loose, you'd miss it.

If that tests good, consider the wiper switch next. This is one of those switches containing multiple resistors and only a few connecting wires. I'd suggest testing continuity between those three wires as you cycle the switch through all positions. The only catch is I don't know what values you should see at which position. An easier option might be to snag a used switch assembly from eBay and plug it in to see what happens.

 

Hi
Thanks for the assistance. Much appreciated.
We have swapped R16 with another relay and also powered it separately and it does work.
The socket seems very tight when pulling the relay out, it's a real struggle. Presuming it does have a good grip of the relay.
We have 12V on relay terminal 1 of R16. Terminal 2 is floating so it seems, kind of what I would expect until the wiper is switched on.

With your idea, of a metal blade the same size I may actually sacrifice an old relay and pull it apart and see if I can measure the voltage on all points from inside.
I also presume the GECM is not at fault. I really hope not, that must be rare. Also presume it's not a ground issue, as we do have a good ground signal at the wiper motor plug.
We already have a replacement set of stalks (as my post in between) and plan to install tomorrow and test.
Thanks again.

Fingers crossed.

 

Or if you're like me, and feel an overwhelmingly strong magnetic pull when walking past a tool store:

https://www.lislecorp.com/specialty-...est-jumper-kit


I think other companies make a similar product. I have the Lisle set and it is slicker than a Clinton testifying under oath. It lets you connect a multimeter and read the contacts with the circuit in action. Amazon (and others) has the kit for about half of the list price given by Lisle.

 

Ok, an update.
Installed another complete stalk assembly and no luck.
Nothing is energizing the R16 relay.

Any ideas most welcome, even if there is another means of putting a ground on the relay pin, especially as the hi/lo relay does work. Can I pick up a ground signal from that and switch it..........?
Thanks

 

Does anybody know where the GECM is? There is a very rough location in the manual but it is not clear at all..........
Thanks

 

OK I found the GECM, it's in the left-hand side (passenger in UK) kick panel.
I have put a pin into pin 1 of FH9 (FH9-1) and then measured continuity to pin 2 of R16 relay socket. Nothing. Relays seem very tight to insert or pull from this socket. I am starting to suspect a bad connection under the relay.

It looks a nightmare to get the fuse box lifted enough to see the underside. Any hints and tips are most welcome.

Also to note when I short pins 3 and 5 on R16 relay socket the wipers come on. This emulates R16 energized, but proves the rest of the wiring is ok. However, could there be a fault on the park switch in the motor? I suspect not as when we plus R16 back into the socket the wipers receive a park pulse and park.

All in all, a pain.

 

Yes.

Any other questions?

 

The GECM location can be seen in this training guide, page 76:

http://www.jagrepair.com/images/Auto...G%20S_Type.pdf

That guide is for '99-02 models, but I believe the location is similar on later models.

 

Sorry yes I was wrong. I meant the wiper stalk as Karl mentioned.
I really like that relay test tool too!!

Maybe a wire problem as you suggest? I had a very long running problem with my old Lincoln LS which shares much of the S Types electronics. The power steering was stuck in highway or hi effort mode. Never set an error that I could find and after following the wiring like your doing I found the FEM was responsible for shifting the PS from hi to lo effort. I took a chance and got a used one. Took the car to Ford and told them to just replace and reprogram the FEM that I provided. The service manager assured me that was NOT the problem and I was wasting my money. They would not stand behind anything that happened if I did not listen to them.

Took a chance and for the $90 programming fee the car was fixed.

As your problem looks to be pretty deep in the car after all the troubleshooting you have done I suggest getting the car hooked up to SDD and go thru some wiper function tests.
Is that possible?
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You have found the problem. R16 is not receiving the command from the GECM to energize. I would suggest running a new wire between those points. It's possible to test this before trying to snake a new wire in there.

For the relay, make four short jumpers several inches long. On each jumper, put a male terminal on one and and female on the other. Use these to connect relay prongs 1, 3, 4, and 5 to their respective sockets in the fuse panel. The only purpose of these short jumpers is to allow access to prong 2.

Fabricate a long jumper to connect relay prong 2 to FH9-1. Turn on the ignition and try the wipers. The long jumper bypassed the break in continuity, so the wipers should work. If so, then you can be confident as you run a new wire for a permanent repair.

 

Not very likely. When R16 is energized for.normal operation, the park switch is isolated. The only time it is connected to anything is when R16 is de-energized (wipers commanded off). Even then it only provides power until the wipers reach the park position.

 

 

Thanks I had not seen that doc before. Appreciated.

 

Thanks for the info and suggestions. We have fixed it. I am just writing it up now ready to post.

 

OK. Update. FIXED!!!!!!!!!!

It was found to be a break in the cable somewhere (no idea exactly), between the loom that runs through the little plastic channel behind the headlight and the FH9 plug. Between the underside of the fusebox and the plastic channel, all is ok. we had continuity. measuring the voltage on the cable we have 12V and as soon as the wipers are switched it drops to 0V.
We just ran a bypass cable which was a lot quicker than doing the loom and removing everything. Suspicion is a break along the front bumper beam or as it runs under the wheel arch liner.
The new cable put is was the same approx gauge and is well hidden to the point you cannot really see it at all.

Wipers working again. Oh well, we have a spare stalk and wiper motor :-)

I hope this helps somebody, but these wire break faults can be unique to each car's problem so maybe not.

Thanks to all of you that contributed and spurred us on.
James and son Edward.

 

Tough problem and glad you stayed with it. I think the previous owner was just throwing parts at it.
So nice to find and actually fix a long standing problem too!
Plus you just can't beat the price of repair either.
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