1988jaguar bulb failure

Search web for "Brake Light Buld Failure Warning". This is a tiny circuit on the driver's side of the brake light unit. Remove the brake light unit from the rear. Get a replacement or do a bypass.

There's a relay in the headlight circuit. That and the fuse a common failure with headlights.
Try to locate the relay, It should be near the battery or the drivers side firewall.
Hope this helps.

There is no sensor as such.
Depending on the make model and year, the cluster or the computer measures voltage in the circuits.

Did you ever test the bulbs or the circuits to the bulbs before replacing them? Circuit board failures are very common. One can usually verify if it is a citcuit board by tapping and/or twisting a little and making the bulb go on and off.

Nice SUV, I have the same with 5.2L V8 Limited!!!

Are you sure that there are no lights out?pay attention to the third brake light because it has 3 bulbs and if one is outit will give you that message.also make sure that all of the bulbs are the right ones.

I used to get the "Rear Lamp Failure" message on my '93 Limited after the lights were on for a few minutes... it went away when I changed the rear bulbs to the same brand. The Lamp Outage Module (located in the LR quarter panel, near the fuel filler) is looking for differences in current flow between the left and right side bulbs.

You probably need a new lamp outage module...
CIRCUIT OPERATION
The Lamp Outage Module (LOM) determines if a rear lighting lamp is not operating. When the ignition switch is in the START or RUN position, circuit A1 from fuse 8 in the Power Distribution Center (PDC) connects to circuit A21. Circuit A21 feeds circuit F87 through fuse 5 in the junction block. Circuits F87 feeds the LOM.
- Circuit G46 from the LOM connects to the Vehicle Information Center (VIC) . When the LOM senses a inoperative lamp, the VIC displays the data to the vehicle operator.
- Circuit L90 which feeds the tail lamps and side marker lamps, connects to the LOM. From the LOM, circuit L90 continues to the license plate lamps. Circuits L21 and L22 from the LOM power the tail lamps and side marker lamps.
- Circuit L50 from the stop lamp switch connects to the LOM. From the LOM, circuits L73 and L74 power the stop lamps and circuit L87 powers the Center High Mounted Stop Lamps (CHMSL) . Circuit Z1 grounds the LOM.

If you need tha owners and repair manual about your ZJ Grand Cherokee, just keep in touch and send me one comment.

Hope this helps (remember to rate this answer).

Although you posted this question under a 03 VW Golf and you have a MKV. The best I can do is a MKIV set up. From the rear trunk there are access ports just for this job. The right port will be just above the light housing you will find a wire harness for the right assembly. Follow the harness and it will lead you to the assembly. Once located you can squeeze the two tabs and pull the circuit board where the bulbs are installed. Push on the bulb and twist anti-clockwise then pull out of the socket.

The left should be the same procedure and it is located behind your audio components.

NOTE: It's a good idea to wipe your hand and the glass bulb, leaving oily residue will cause early bulb failure once in operation.

Pull the rear bulbs out an inspect them for dark marks on the glass or abnormalities in the filament.
A bulb that works but is on the verge of failing will trigger the indicator on the dash as well.
Failing that, the lamp failure module is very common to fail, triggering the light as well. You can pry the box lid off and usually see burn marks on the circuit board when this happens.
The lamp failure module is located behind the left rear tire area in the trunk.

Hi,

I bought a keyless entry for my car on the internet, and needed to find the bulb failure module so that I could program it. All I knew was that it was on the left side of the trunk, but I didn't see anything, and was not sure if I had to remove something, of if it was part of the visible cable. Thank you very much for your help. I should be able to program it now. Thanks again.

take the bulb back out have someone sit in car apply brake get your self a circuit tester and check to see if this circuit is carrying efficient 12 volt current! some times in cold weather these bulbs get hot with long period of breaking and when released condensate and rust begins and you get what you have perhaps bad socket! this would be a ideal location to begin and probably end,

the light bulb is the load in the circuit. if the 12v. side of the circuit was shorted to ground. it would blow the fuse. the ground side of the circuit is supposed to touch ground. so the only way for a bulb have an early failure is at the bulb its self. some bulbs get so hot during operation that the oils from your skin transferred during installation will actually damage the bulb. another cause of over heating can be, loose or corroded pins in the bulb socket. this adds extra resistance to the circuit, which means more heat. i suggest when you replace the bulb the next time use a paper towel to handle the bulb with. ensuring no oil from your skin will come in contact with the bulb.