one brake light stays on 24/7
 

My brake lights work normally... two of them, anyway.
The right rear brake light never goes away-- even when the car is turned off.


I removed the everlasting brake light bulb so as to preserve battery.


Any suggestions would be appreciated. I have no idea where to look.
thanks

Your SLCM (Security Locking Control Module) needs to be repaired or replaced if you can find a compatible used one).

The SLCM module is located under the battery in the trunk.

Look at the following thread:
https://www.jaguarforums.com/forum/x...ed-bulb-10830/

also use the forum search function with "SLCM"

Also found post on this issue:

https://www.jaguarforums.com/forum/x...a-97930/page2/ look at post# 13.

Jim Lombardi

Jim,
Thank you sir!
Fred

My did the same thing I sent mine to module master's in Idaho. 50 bucks and it works great. Took like a week.

Hi pappahobby
Not sure about the $50 -- their webpage says $200.

Module Master 2006 S. Main, Moscow, Idaho 83843, USA
(1998-2003) Security Module Rebuild Jaguar XJ8, XJR, XK8 $200.00

This rebuild is guaranteed to restore your malfunctioning security and locking module with nonfunctional or always on brake light on either passenger or driver's side. Usually the driver's side is affected. Another symptom of a bad security module is the third brake lamp staying on continuously. If your security module looks like the one pictured, we can fix it.


https://cimg5.ibsrv.net/gimg/www.jag...57b8d8b3c7.jpg

Weblink to their webpage:
Jaguar XJ8, XJR, XK8 (1998-2003) Security Module Rebuild | ModuleMaster

Jim Lombardi

sorry. That's what I paid a couple of years ago. Still works great. I suppose you could get one off eBay with the same part number. There is conflict story's on this forum if it needs to be programmed for your car or not that's why I went with repairing mine.

I have the passenger STOP LIGHT allways on PROBLEM. Made some photos of security module. Everything looks ok. Can the chipsets still be fried/burned?

https://cimg0.ibsrv.net/gimg/www.jag...b03def6deb.jpg


https://cimg1.ibsrv.net/gimg/www.jag...8f7568bb79.jpg


https://cimg2.ibsrv.net/gimg/www.jag...a73480735c.jpg


https://cimg3.ibsrv.net/gimg/www.jag...9f66a4fb49.jpg

I think someone on this forum found that only 2 of the high side power switches are used and one is just IDLE. Maybe install parallel jumper wires to the idle one?????

bob gauff

Looks like my SLCM is bad: The right rear stop light will not come on. Checked the bulbs, checked the wiring and continuity of the white board and sockets. No power.

Ross reminded me that the SLCM has separate circuits for right stoplight and left stoplight.

Bob: I like your comment about a idle high side power switch. Where are they, how do you tell which one does what? I ain't good at electronics. But I would hate to lose the car for a couple of weeks sending the module to Idaho.

For the moment, taking braking signal from blue wire left lights and bridging to orange on right. Same as RobertDIY's youtube video. At least the cops won't be pulling me over after dinner out (with some/lots of zinfandel!).

Is it ok to purchase one off of eBay to replace or is this something that has to be programmed?

VCATS
 

Banar,

Whoever repairs your module needs your cars VCATS number. This can be found (eventually) on a long paper sticker somewhere under your grey felt trunk lining.
Look in area around CD & navigation unit on left side. But could be anywhere! (Jaguar version of Easter egg hunt)

Some regular vendors advertise on E-Bay. I'm not sure what happens if you install a box with the correct LNG number but different VCATS.

Module Repair of Van Nuys, CA repaired my Security & Locking Module. Not promoting them, but coupla years later still working. Fast turnaround.
www.ModuleRepairPro.com

@Coventrywood
Thank you.

btw, is there a way to confirm that SLM is the problem? (before sending it)

Symptom, symptom on the wall...
 

Banar,

If your symptoms match those in the thread above (as mine did) I'm guessing you have same failure.

But I don't know of a "shade tree mechanic" test for this module.

Hopefully other much smarter folks will jump on here if such test exists.