All kinds of warning lights start on and off from my dashboard.
one thing Ive realized that they come out when I on bumpy road surfaces.(welcome to NY,we have the third world country grade road surface and any public infrastructures)

FYI,I just changed my vacuum booster hose and connector for 180 for the parts alone.(another Jaguar rip off)

Please help

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I expect a bad or loose electrical connection and would start right at the battery, both pos. and neg.

There are TSBs for INST PK and network faults but they are usually VIN specific.
Sorry you won't share more info about the car.

bob

It sounds like a bad connection on one of the major can-bus modules, as Bob has mentioned the inst pack, also the trans shifter harness connection can do this. You'll need to check both.

@ Bob, I think Vincent's car is an XJR - but we shouldn't assume anything lol!

Mine is xjr (reincarnation of my crashed xjr100). What exactly is can bus module? Is it the same thing as abs module? Where is that located ? Pictures or diagram will help

vincent, you have been here for years, I don't understand why you haven't downloaded the relevant electrical schematics from the stickys or jagrepair.com. The CANBUS is a computer network connecting the main modules, usually a green/yellow wire pair in the schematics.