Did you check the rear fog lamps?
Also the brake lamps. The cruise function may be connected to the brake light switch.

 

Did you resolve this problem; mine has the same symptoms? If you were successful share what you did.
Thanks.
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Welcome to the forums Bob,

On the subject of sharing, please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Near 11-yr-old thread so may not get a reply....

 

The switch is actually two micro switches. One for cruise and the other for stop lights. So the cruise switch could fail and still have stop lights. Also the lever that actuates it could not be making contact, and need adjusting.

 

Brake pedal switch part number: LJB6420BB

There are lots of threads on swapping this part. It's behind and above the brake pedal. You will need:

• A spanner or ratchet with I think a 10 mm socket
• A flash light mounted on your head
• If you are a big guy, contortionist skills or an 8 year old child.

 

Rather than replacing the failed brake pedal switch assembly with a new one from Jaguar, you are much better off replacing just the two microswitches contained in the assembly. Decent soldering skills are required. I had a local EE friend do it for me after the new assembly I installed in late 2012 failed in late 2016....

This approach will cost you less than $15 (including shipping) compared to the $130 or more for a new assembly, and the replacement microswitches (one source is mouser.com) are better-quality than the OEM ones....

 

After having a local shop replace the brake switch twice(in case 1st switch was bad), I took the car to local Jag dealer. They replaced the switch again, and 'check rear lights' went out, but still no C.C. Had to replace switch in the steering wheel. Now all seems o.k.