Tibbetts,

As Mac Allan said, I would really avoid spending money on parts until you've proved that they are faulty. I would still go back and do the voltage checks that I suggested:

- Back-probe the relay socket and check that there is voltage on the output pin when the hood down switch is pressed. Remember that it times out so check the voltage as the switch is first being pressed.
- IF you've got voltage at that time, then remove the 1/4 trim panels and check for voltage at the motor when the hood down switch is pressed. If no voltage, then your problem lies in the wiring to the motor.

Let us know how you get on.

Cheers

Paul

 

I have installed new relays. No change. I’ve jumped #87 to #30. Still no change. Is there a way to bypass the ecu?
pete

 

That should have done it. The relays are controlled by the ECU, so by jumpering the power at the relay socket you have removed the ECU from the equation. With a multimeter, can you test from with the green/purple or green brown wires and see if you have 12V from there to any ground on the body?

 

Is this test done with 30 & 87 jumped?

 

No, if you look at the diagram we are checking that there is power coming into the relay socket for the relays to switch.

 

As a thought, when you jumped the one relay, were the others in place? For example, if we want the window to go down, the ground path is through the up relays, so that relay has to be in place for the circuit to be complete.

 

Great point. I can’t remember. Will try again and will have all other relays in place. This would be so much simpler if Jaguar haven’t felt the need to be clever. Two simple switches, like most other rear window have, would have been better. Thank you for your help. I’m slowly becomes enlightened.
Pete

 

I did notice that when operating hood, I had to have both relays plugged in. Hood would not operate, either way, without both in place but works perfectly then. Again, I’m confused. Since neither of the windows work at all I didn’t realize that all relays had to be in place to get the ground.
Pete