My 75,000 mile 1994 XJS Convertible developed a intermittent at first, but now LR quarter window that won't go up. When the problem first started I could get it to go up by pulling on the window a few times before raising the top. Where to look? Is this a bad motor? It is stuck in the down position.

 

If you're experiencing the same problem I get (intermittently), you'll need to tap the motor housing a couple of times and it'll work again.

 

This is a very easy fix. It happens to all xjs cars eventually. You need a new relay. Its in the trunk. Might as well replace all of them at once, or you will be chasing them down one after the other. Any auto relay should work. Just search ebay for sealed car relay. I've been using cheap $2-5 relays for 5 years now with zero issue. Do not waste your money on new Bosch OEM relays that are not sealed...

 

CB1 D M 12V Automotive Relay 40A 12VDC 1 Form C w Dio Seal Brkt Panasonic 1 Per | eBay


4 Pcs Transparent Auto Relay 12V 40A 4pin Waterproof Seal Relay | eBay

 

Hoodun, are you sure its a relay and not a problem with the bearings in the window motor? When mine go bad, I tap the housing and it works again. A bad relay wouldn't respond that way, would it.

 

90% sure. There is always that 10%...

Just swap the right relay with the left to test first. I put my money on the relay being bad, just because I had this problem with my 91 xjs and my 94 xjs (all four quarter windows eventually).

 

Mine does the same. Changing the relay doesn't help....hitting the motor does

 

Well here's my stab at finding and resolving the problem.

https://www.jaguarforums.com/forum/x...tached-162775/

Ever since I took it out and apart, it hasn't given me any trouble, however it hasn't been all that long AND I did flip the rotor around so the rubbed down portions are at the other end now, that could have extended the life of this part.

In any case, I found a similar enough looking housing from a Ford and if I have one more issue, I'll swap cases which should essentially replace the bearings at the tip of the housing. I'll update that thread if I ever experience another stuck window.

In my case, the relays do not seem to be the cause of the problem.

 

Hi - I have a '94 XJS convertible with this problem. How do you reach the motor housing to tap it?

Fred in Vancouver

 

Vee and Discoin,,, if you're out there!?
This is an amazing contribution to the forum,,, a great tread! Thank you. Lol, I basically wrote the same thing in the original thread, but had to just say it again!

Thank ya thank ya...

 

Tapping the motor is easy. Believe it or not, all I do is thump the cover panel a couple of times firmly while holding down (or up) the switch when raising or lowering the top. Sounds crude, but works every time. I got tired of thumping a couple of years ago, so left it in the "up" position and pulled the relays, lol.

 

Hi - can you tap the motor housing without removing side panel?

 

That's great news. I'm mechanically inept, but thumping a cover panel I can handle -- thanks!

 

You absolutely can, but you need something that can reach it. I use a loooong screwdriver.

 

Hi Vee,

I’ve gone through the threads but can’t figure out how to remove the interior panel to access the right quarter window motor. I don’t want to break or damage any of the interior by just pulling on it.

thanks

 

Cool! You have an XJS!?

I looked at your profile and don't know the year make and model...

First, have you checked fuses and relays? Have you tried applying a little voltage directly to the motor? If so,,,

The rear panel behind the seats, on a convertible? Open the top/hood... Move the seat back forward, you'll see 2 or 3 screws in a decorative button up the pillar. Remove them. Up top, on the panel near the window, a couple more screws. Remove those as well. My panel is tucked in pretty well into/under molding and stuff around the door seal trim-ish, and what your going to want to do is a little light prying and some wiggling. Move the seat belt so the buckle and strap provide some slack. Pry the little tab OUT from under the tread plate and keep wiggling. Keep an eye (if it's a convertible) on the area where the window meets the waste seal. It'll come out. If the window is stuck up, getting the waste seal to come out from between the seal and the window on the inside might be a little tough.

I haven't described ANYTHING on the forum in a long while. I hope this makes sense and helps. These cars are pretty tough, in most cases ya almost have ta TRY and break something. I love my XJS

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yes sir,

I have a 92 XJS convertible with 35k miles.

there are no screws only one plastic tab that is on the top of the panel behind where the glass would be if it were up. I can’t pry it out and don’t want to break it. I assume there is a special tool to remove it. I have no clue how to get the panel off.

 

Feel down the panel behind where the seatbelt is hanging, there are three plastic 'poppers' there that need to be carefully pulled out. On my '92 there is a screw on the top need behind the window. Some have a plastic popper in place of the screw. Pull the panel upwards and there ya go....

 

Thanks, I will give it a try.

 

OK, so that plastic tab that you can see through the quarterwindow? Yeah, you want to remove that...permanently. If the windows get stuck in the up position, you will never be able to remove the interior panel.

That being said, you might want to buy some plastic fir tree removal tools.

Something like this is what I was thinking:


That will remove the one you see. There are TWO more hidden tabs along the vertical side of that trim piece. If you start from the bottom corner, since the aluminum treadplate is likely pinning that down too, you can begin to pry that away from the car. You should even be able to get your fingers back between the tan trim and the felt lined tube where the door seal is. That's all there is to it.