The top on my XK8 will not go up. No leaks evident and the pump is full. I did close it manually but the rear windows stay down. Tried swapping the relays around without success. I am trying to workout the top closing and opening logic sequence to determine root cause. Can anyone help?

 

Have you checked at the pump for power? If you do not have power check your fuses. You say you did swap the relays. If they are OK use your door key to open/close the roof. You may have a bad switch. You can go to my web page for additional information.

Good Luck!
Gus

 

Hello Gus,

The pump does seem to have power. With the hood up, when I press the hood down switch, there is a clicking sound at the pump, but nothing works. All the fuses were checked OK.

By the way, I didn't realize that the door key operated the hood. How does this work?

 

Did you make sure that the manual bypass valve was closed (fully clockwise)?

Open the valve and manually cycle the top, including fully closing/opening the latch with the Allen key, with the ignition on so the Body Processor Module knows what is going on. Twice is nice. That should reset all the position logic. Close the valve and try the console switch.

The key in the driver door will open and close the top. Just have some patience, it is a little slow.

 

Well I did not know until I was told the other day. I have not tried it yet but I understand it works. Turn the key and hold it for the roof to respond. Have you looked and the diagram on my page? I am not proficient in trouble shooting this system because I never had a reason to do so. I have spent most of my energy understanding the problem with the hyd. lines. However I seem to be getting several e-mails asking me the same question. I just sent an e-mail to a guy that had the same problem. If he gets back with me I will let you know. As for the pump not working it sounds like the relay or the body processer. If it is the processer it can be reprogrammed by Jag. If the battery gets low on the car it will cause things not to be in sequence like the windows not going back up. Fuses for the roof are located in the trunk.
Good Luck!
Gus

 

Tom,

Thanks for reminding me of that. If that is tha cause what do you think is causing the manual valve to open like that?

 

Chris,

How did you make out?

 

Thanks for the tips guys. Appreciated. I will try it out over the weekend and get back to you.

Have a wonderful weekend.

 

Gus,Tom,

I did try opening and closing the top manually with the ignition on as suggested. No luck.

The roof/open warning bell sounds and the pump makes a short whirring noise as expected, but the roof does not open or close. Maybe it's time to take it to the shop.

Thanks for your help guys.

Chris

 

Chris,

If you send me a PM with your e-mail address I will send you a check list of things you can check.

 

Thanks Gus. Just sent you a PM.

Chris

 

Go to my web page and I have 2 locations on the page about the hyd roof operation. Read that first.

 

[The key in the driver door will open and close the top. ]

Where is this key located??
Thanks
Fred

 

It is the key you use to lock/unlock the door and start the car. Is that what you are looking for?

 

Also guys, i had one of my 'rams' (the piston thing that actually takes the pressurized fluid and 'lifts' the top leaking. She was groaning quite a bit also and would open easier than she would close during this short period. Just another 'part' to check.

 

Now I recall! Always check for power. Thanks for your note.
Gus

 

the fluid is low. What type do I use. Should the top be up or down?

 

This is what you need to use JagRepair.com - Jaguar Repair Information Resource and the position of the does not matter..

This is a how to http://www.jagrepair.com/HydraulicPumpRefill.htm

 

It is important to determine what type of fluid is there now before adding to it. What is its color?

Follow the Jaguar spec; fill to the lower hash mark on the reservoir if the top is up, to the upper mark if the top is down. The fluid level in the reservoir will change as the top is raised or lowered.