i Have now bought an xk8 1996 which i knew had an electrical problem and am now trying to sort it out.it was tested by the local dealer before i bought it and they say that voltages to starter ok , rcm and can ok, and substituting bpm earth then powers starter bpm internal earth has failed. the previous owner has purchased a replacement bpm but the original bpm is LJB2500AD and new one is LJB2500AF are these interchangeable and if so how to reinstate programming. all other electrics are working ie roof , windows etc and lights on dash ok it just will not start. ANY HELP GREATLY APPRECIATED

 

Since the replacement is a newer version it will probably work, but may need to be integrated with dealer level software, which some indy's have.

If it were mine, I would install it and see if the car starts.

 

fyi did you check these fuses?

Ignition Switch at CRANK Position: When the ignition key is set to the crank position, the following sequence occurs:The BPM 'CRANK SELECTED' terminal is taken to 0V by the ignition switch.The BPM 'O/P ENGINE CRANK' terminal provides a path to ground for the starter relay coil, via Fuse 5 (10A) located in the under bonnet fusebox. This path to ground also indicates to the ECM 'I/P ENGINE CRANK' terminal, by taking it to 0V, that the engine has been requested to crank.With the starter relay contacts closed, power via Fuse 3 (25A) in the engine management fusebox, is supplied to the pull-in winding of the starter solenoid.The solenoid main contacts close and are held closed by the solenoid hold-in winding.Battery power is supplied to the starter motor through the solenoid main contacts, direct from the battery and the High Power Protection Module.

While probably not your problem just double check the inertia switch,
The inertia switch, when operated, disables the ignition system and fuel pump, releases any locked doors and switches off unnecessary electrical systems.The inertia switch is located next to the fuse box at the left-hand end of the fascia.To reset the switch after it has been activated, the rubber cap on the top of the switch is pressed down.

 

no i didnt check those fuses so will try them as i am fetching the car home tomorrow so can really get chance to work on it.I will check in with any reports tomorrow.

 

Hi Again i have checked the fuses all ok switch has not tripped out, I now have roof and windows working with ignition on dash showed traction fault and stability fault I have now removed them but it still wont turn over. the previous owner sent a jaguar report with the car which says "BCM internal earth fault " any idea how to fix this and how to go about reprogramming oh forgot to say doors will not lock or unlock from remote fob and central locking not working if that makes any difference to your ideas if you have any thanks Ian

 

Have you swapped to the new BCM? If it won't work with that you will have to have the car towed to a shop with the proper software, hopefully an independent.

If we knew where you were located some one might be able to assist.

 

i am actually in evesham worcestershire uk not too far from the home of jaguar coventry so if any members are near me please let me know

 

hi anyone know how i would go about getting a new transponder key for an older xk8 and where would be best to buy a new headlight without having to change both

 

I'm pretty sure the transponder key is a dealer only option - it has to be programmed to the car. Photo shows where the little "transponder chip" is fitted to the key.



Headlights are available from Ebay / breakers etc. There's Catkiller (Trevor), SimplyPerformance and Eurojag in the UK, all of whom are worth a call. The headlight comes in two parts - if you *just* have a cracked glass, you don't need the whole lot. But - if buying new (look on the S N G Barratt site for example) - prepare to take out a second mortgage !

 

thank you but main dealers are not being much help and i will try the listed sites for the headlight it turns out that my car is not a 1996 but a 2003

 

Easy mistake to make !!

 

the seller and reg number both said 1996 ie r reg but v5 came back today and says its a 2003/????

 

If you paid 1996 price for a 2003 car, it's probably worth having a few teething problems !
It's not 100% proof of anything BUT - look at the engine number on the V5.
e.g. Mine is (was) 9705210400 which means it was built at 0400 on the morning of21st May 1997.
If the first two numbers are 96 - that's probably when your car was built. It may have had a new engine since then, but unlikely that the V5 has been changed.
Cheers,
David.

 

engine number 0305230627

 

only paid £1500 so i guess its worth spending a bit on it

 

Looks like it's 2003. What gear numbers are on the J-Gate?