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Jaguar XJ-Series Electrical Glitches

69 messages,  Last post on Aug 24, 2009 at 8:17 AM

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What is this discussion about? Jaguar XJ-Series, Jaguar XJR, Sedan

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#60 of 69 Re: XJ8L GEM module? [goodkitty] by LotusExige4me Aug 06, 2009 (6:58 pm)
Replying to: goodkitty (Aug 06, 2009 7:51 am) Hello, I am not sure I ended up replacing the whole wiring harness on the drivers side. This solved a lot of problems, very expensive but now it all works. not sure if that helps or not. If you want a harness try car-part.com they are a salvage yard type thing and you can put in what you are looking for. With the jags one bad wire and the whole car is NFG, Good luck Brian
#61 of 69 1996 XJ6 won't start, bad ign sw, relay or module ??? by goodkitty Aug 07, 2009 (8:33 am)
I have a 1996 XJ6, 4.0 116k miles. I tried starting it and heard a click but nothing happened at the switch. Checked the battery and found it to be low at 9.3V so I added another battery but every thing acted like it was in a low voltage mode at the panel. Installed a new battery but still no response. Guages etc. now bright but no dome, trunk or head lights. I do have little lights on at the bottom of the head lights. I then shorted the starter and car started but I couldn't take it out of park. I removed the lock pin and put in nuetral to see if it would start but nothing. Checked every fuse this car has which are everywhere and they were all good. I do hear some relays clicking in the battery compartment when someone turns the switch. A real nightmare to say the least. I don't think it's the shifter module perhaps it's the computer I don't know. I bought the Jaguar parts and service manual off Ebay but it dosen't offer good trouble shooting help or identify and follow the serries of relays and modules as to what they do or how to test them.   CAN ANYONE OFFER SOME HELP?    Thanks, Goodkitty
#62 of 69 Re: Jaguar XJ-Series: Electrical Glitches [Mr_Shiftright] by jaguar13126 Aug 09, 2009 (6:13 pm)
Replying to: Mr_Shiftright (Nov 05, 2006 1:28 pm) I have a 1988 Vandenplas with an electrical issue with the brake lights. i have replaced the rear lamp relay module with 2 different ones and am still getting intermittent failure of the brake light. I have also re-wired the grounds. Any hints?     Replies to this message: Mr_Shiftright (Aug 09, 2009 8:15 pm) jaguar13126 (Aug 10, 2009 6:42 pm) Mr_Shiftright (Aug 10, 2009 9:07 pm)
#63 of 69 Re: Jaguar XJ-Series: Electrical Glitches [jaguar13126] by Mr_Shiftright HOST Aug 09, 2009 (8:15 pm)
Replying to: jaguar13126 (Aug 09, 2009 6:13 pm) When you say intermittent do you mean the lights sometimes work sometimes don't?   Have you check the brake light switch itself for loose wires, etc? I'm not sure if yours is brake pedal activated or master cylinder activated (mechanical switch or hydraulic pressure switch). Replies to this message: jaguar13126 (Aug 10, 2009 6:42 pm) Mr_Shiftright (Aug 10, 2009 9:07 pm)
#64 of 69 Re: Jaguar XJ-Series: Electrical Glitches [Mr_Shiftright] by jaguar13126 Aug 10, 2009 (6:42 pm)
Replying to: Mr_Shiftright (Aug 09, 2009 8:15 pm) yes it worke moest of the time. when it does not work i can rap the rear module ant the light comes on. Replies to this message: Mr_Shiftright (Aug 10, 2009 9:07 pm)
#65 of 69 Re: Jaguar XJ-Series: Electrical Glitches [jaguar13126] by Mr_Shiftright HOST Aug 10, 2009 (9:07 pm)
Replying to: jaguar13126 (Aug 10, 2009 6:42 pm) Oh well then---a bad ground I would say.
#66 of 69 Re: XJ8L GEM module? [goodkitty] by scottthorn Aug 11, 2009 (5:26 pm)
Replying to: goodkitty (Aug 06, 2009 7:51 am) I got it to a shop that knows what they are doing - they had to replace the transmission module, engine module, and key module - all used, and several thousand dollars later - everything was fine. 3 months later, I turned the key and nothing! It's back at the same shop - they say the transmission module is gone again and that it is a very rare thing, so they are keeping it for a while to drive around and see if there is something else that might have caused the failure. I'm considering getting it running and selling it fast, even though I love it.   - Scott
#67 of 69 Suspension by mrendon Aug 20, 2009 (6:02 pm)
My car too low light came on and after a while my suspension failure light came on just trying to find if someone had this issue before and what to do? The dealer said it might be the compressor a 1000 dollar repair. Please help. 2005 JXL
#68 of 69 Rear lamp module by jaguar13126 Aug 23, 2009 (12:31 pm)
I have an issue with the turn signal. The turn signal does not work when the brake is applied. I have replaced the rear lamp module with used part and the same thing still happens. I still get the lamp out warning in the driver information center. are there any fixes for this with updated modules? Any suggestions?
#69 of 69 Oil Pressure gage on 88 XJ6 by denny_88_xj6 Aug 24, 2009 (8:17 am)
I've only had the car for a few months, the oil pressure gage has never worked. It goes from 0 to MAX as it pleases. I suspect the sending unit is flakey. Does anyone know the specs on the sending unit, the resistance range it uses? These sending units are almost impossible to get and very expensive. I would like to try to adapt one from another car. If I can find one that works, I would be happy to share the info.

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