I know that it is not uncommon to have an electrical problem with a Jaguar, but this one has seemed to stump every shop i have taken it too.

So here it is...

Drove the car to work in the morning (everything working fine), came out after work and went to unlock the car using the FOB, and nothing. Unlocked the car using the key, and proceeded to start the car. The car started fine, but there was a message in the window that said ELECTRICAL FAULT. The car would not shift out of park and i had it towed to my local shop. After a through inspection, and yes the brake switch was checked, I was told that it was most likely the BCM. Is this true? The systems that seem to be effected are: Shift interlock, Brake lights (not including the center brake light), security system and door locks, remote entry/lock/unlock and also the battery discharged rapidly with in a day or so and would not take a charge. I have been searching the internet trying to find some kind of answer. If anyone can help please let me know. Thanks so much.

 

I think the BCM is way up the list, but there are a few things I think you should check out. First, check the mounting studs on the BCM, there are 3 10mm nuts that bolt the BCM to the fascia structure behind the glove box. The BCM grounds through these studs, and if they are not tight, all sorts of weird things can happen. Also check all the power [battery] cable nuts at the protection module in the boot, on each heelboard fusebox, and at the two fuseboxes under the bonnet. If they get loose or corroded, power loss to various systems can result.

I like checking the cheap stuff first!

Cheers,