My Jaguar is a 1988 and I don't have ABS only conventional brakes. I was told that the problem was a switch that needed to be replaced and someone said it was rhe memory modular or something semilar to that which controls the brake system. Thank you for your time, I really appreciate it.
Brakes on 1990 Jaguar XJ6
I am sorry I don't fully understand your description of the problem. If your car has ABS brakes it has a computer that controls the the braking system and receives input from the wheel speed sensors. If your car has conventional non ABS brakes it would not have a computer at all. Again if your car has ABS brakes the brake accumulator or pressure switches at the right front side of the car may leak or fail. The ABS computers fail on some European cars, there are several companies that repair them (a cheaper alternative to buying a new computer), one such company is Fuel Injection Corporation Livermore California.
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pretty sure your 88 has ABS. go to www.jag-lovers.org and look up the xj40 book and forum. to register is free and you will get a wealth of info on your cat