Last post on May 06, 2011 at 10:41 PM
You are in the Jaguar XJ-Series
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Jaguar XJ-Series, Jaguar XJR, Sedan
#28 of 75 XJ8L GEM module?
Oct 26, 2008 (8:03 pm)
I have a 1998 XJ8L and love the way it looks - I just wish I could drive it. It won't start. My mechanic (not a Jag expert, but honest and good with cars generally) has been trying to figure it out, and is close to concluding the GEM module needs to be replaced at a Jaguar dealer, with a likely cost in the THOUSANDS of dollars. I only paid $6,500 for the car a year ago.
When I said it won't start - everything lights up when the ignition is switched on, but when I turn the key all the way, nothing happens. I mean nothing. No sound at all, no engine turning over, no starter sounds, not even any clicking of relays. Absolute silence. Is it the GEM? Will it cost thousands of dollars? Can't we just cross a wire somewhere and bypass all this electronic crap?
#29 of 75 XJ8 Starting Problem
Oct 27, 2008 (5:56 am)
Mine is a 99 XJ8. My starting problem turned out to be the battery. I had tested it with a meter and it had about 12 volts so I moved onto other problems, wasting time and money. Problem was that, although the voltage was OK, the amperage wasn't enough to crank the starter. If you have an original Jaguar battery (white color) and it's more than 3-4 years old, it's probably shot. Another possibility is the computer needs to be reset which can be done by removing the + battery strap for 15 minutes then reconnecting it. Good luck.
#30 of 75 Re: XJ8 Starting Problem [deadjag]
by MrShift@Edmunds HOST
Oct 27, 2008 (7:53 am)
Good advice. Unless you "load test" a battery, just measuring voltage at rest doesn't tell you much about it's condition. And that's true, most batteries are pretty tired after 4 years of use. Some go longer but on average 4-5 years is plenty for optimum performance.
#31 of 75 Re: XJ8 Starting Problem [deadjag]
Oct 27, 2008 (8:16 pm)
Thanks to both you and Mr. Shiftright for the responses. The battery had died back in February. That was weird. The engine would turn over and over, but never start. We thought maybe it was a fuel pump problem! But it was just the weak battery. Replaced it and everything was fine. For a while after that, I would try to start it and nothing would happen. Then I could switch it off, immediately try it again, and it would start right up. Or sometimes I would have to turn the key off and on two or three times before it would finally crank. That's what made me think it was some sort of simple relay switch problem. Obviously, the last time it happened, turning it off and on didn't work after trying it 20-30 times.
It will be interesting to try disconnecting the battery though and let the computer reset. Thanks for that one.
#32 of 75 xjr 1998 jag
Nov 28, 2008 (2:30 pm)
I turned the key on and motor does not turn over. I had to pull fuse on windshield wiper because would not turn off. any ideas? Thanks Doug
#33 of 75 Re: xjr 1998 jag [eurobabe]
Nov 28, 2008 (5:50 pm)
I would put the fuse back in to see if the wiper starts. Could be as simple as a bad battery caused by a short or ground in the wiper assembly/motor. This might have continued to discharge the battery even though the wiper stopped when the fuse was pulled. If this were true, it may have discharged the battery below its ability to crank the engine. If the battery is relatively new, should be able to jumpstart after letting it charge up for awhile. But, if the cause is a short or ground, that would have to be eliminated. Good luck.
#35 of 75 Battery connected backwards
Dec 05, 2008 (4:21 am)
yes stupid me put in new battery and it was configed different from the the old one and in one second poof sparks and i disconnected it, now car won't turn over, headlights won't work,right side windows won't operate.
This a '93 xj6 VP
Anything some can shed light on to check?
Dec 05, 2008 (6:14 am)
I expect you've either blown some fuses, damaged the new battery or both. I personally would disconnect the battery and use a second vehicle and try to jumpstart it. Carefully connect positive to positive and negative to negative without the new battery in the circuit at all -- make sure the jumper connectors are separated and don't touch each other. If that starts the car, then the new battery is either discharged or damaged. You might also then assess whether the lights work or not. Then you could try to recharge the new battery -- it it doesn't recharge, it might be damaged.
#37 of 75 Window hooked to door handle repair 2000 XJ8
Dec 13, 2008 (2:54 pm)
Just replace a driver's side exterior door handle done by a local jag mechanic.
Now the window on the driver's side not working. Mechanic said he worked trying to get the window to work but no luck...wants me to purchase a new motor for the window. The window worked fine until the new handle was put on.
Just read on another forum where someone else had the same problem but there is no response to this issue. Any ideas out there? Would dearly appreciate your information!