Hello! Writing in today with a power window issue. I've posted about this before but in the wrong area. https://www.jaguarforums.com/forum/x...-issue-274572/

There's also some updates.

Vehicle is 2004 XJR 4.2L v8 supercharged (US)

As of now, none of the windows will roll up or down except in this specific situation:
Insert Key
Turn key to ON position but do not start car
Jaguar logo displays on the screen
Jaguar logo disappears and message displays: ignition off / ac not available
All window switches work : up and down
Open door / or turn ON vehicle and window switches are no longer working.
Turn On vehicle: Window switches do not work. Turn vehicle off one click (ON position) and wait for the ignition off / ac not available message and all windows work again.

Previously we checked the window fuses, the main switch and the wiring connected to the switch. Tried the battery reset method.

Almost purchased a new switch but after further isolating I don't believe it would be the switch if it works with the key in ON position only? could be a relay problem with power being cut once the vehicle is started?


I still have all of the other issues but I'll post separately about them as we begin to work on the car again, this is most pressing at the moment.

Thanks for the help!

 

swap relay temorarily
If no improvement trace the module which controls windows and examine
plug and socket in module and clean them.
Examine pcb in module for any water ingress,overheating, dry joints etc

Just thoughts

And another one!
Your air filter inlet is not blocked with leaves is it?
Along with water on main ECU

 

Just guessing here. As the problem depends on the vehicle's "state", it's not a faulty switch (and unlikely just a Relay), more like a faulty "module" that has lost it's marbles.
Since you have other electrical issues, doesn't seem to be necessarily limited to the windows? What would be common?
I make an admission here. Whilst I like to know what's going on, I take my car to an Indy and pretend to be a "Fat Cat", which these cars were designed for I was told?
$10,000 in the last few years can't be wrong!!!

Or from my computer career, just wiggle the Connectors!

 

Can you DIY any of this?
Do you have a working SDD and can you scan the car with that?

It will be an expensive lesson if you can't?
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