Modules
Modules
Veteran Member
Joined: May 2012
Posts: 3,290
Likes: 1,328
From: Winchester, CA
I guess my first question is what's the problem occurring that makes you think a module has lost its programming.
The second question is what are you working on. Make, Model, Year. If you put your vehicle in the signature the we will always know.
The usual module problem would be corrosion at the connectors and failed components on the circuit board. Unplugging a module while it has power can damage it. Disconnecting the battery with the ignition on or the vehicle running can damage a module.
You might want to give us a few more details and we can work from there.
The second question is what are you working on. Make, Model, Year. If you put your vehicle in the signature the we will always know.
The usual module problem would be corrosion at the connectors and failed components on the circuit board. Unplugging a module while it has power can damage it. Disconnecting the battery with the ignition on or the vehicle running can damage a module.
You might want to give us a few more details and we can work from there.
Thread Starter
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Member
Joined: Jun 2016
Posts: 66
Likes: 2
From: panhandle, tx
I have a 99 xk8 and there are several things not working. the column speaker, horn, convertible top,trunk lights,not all messages are coming up on the message board. I have not unpluged any modules in any way. I understand that the bpm controls a lot of things and the slm controls the top among other things. any help would be welcome.
Veteran Member
Joined: May 2012
Posts: 3,290
Likes: 1,328
From: Winchester, CA
Well before you start swapping modules let's do a little trouble shooting. We can look at each problem individually.
1. Column speaker: Below is a thread to test and replace the speaker. It is possible the speaker is just shot.
https://www.jaguarforums.com/forum/x...cement-177835/
2. Horn: The horn is controlled by a relay. Using the owners manual locate the relay and swap it with an identical one and try the horn. You may also want to check the ground leads to the horn and make sure they are in good condition. You should also locate and check for bad fuse.
3. Convertible top: Here again you need to do a inspection of the fuses and relays. If it still doesn't work get back and we can go from there.
4. Trunk light: First is the bulb good, then spray contact cleaner around the plunger and the lock mechanism.
Finally before you get started on all of the tests and inspections get a load test of the battery and make sure it is fully charged. Reinstall the battery and connect the positive terminal to the post then take the negative cable and hold it against the positive cable for 5 to 10 seconds and then connect it to it's post. Once you are all connected up start the vehicle and check for the condition of the system inspection. It will idle a little high and run a little rough for a few minutes until the ECM relearns the engine settings.
1. Column speaker: Below is a thread to test and replace the speaker. It is possible the speaker is just shot.
https://www.jaguarforums.com/forum/x...cement-177835/
2. Horn: The horn is controlled by a relay. Using the owners manual locate the relay and swap it with an identical one and try the horn. You may also want to check the ground leads to the horn and make sure they are in good condition. You should also locate and check for bad fuse.
3. Convertible top: Here again you need to do a inspection of the fuses and relays. If it still doesn't work get back and we can go from there.
4. Trunk light: First is the bulb good, then spray contact cleaner around the plunger and the lock mechanism.
Finally before you get started on all of the tests and inspections get a load test of the battery and make sure it is fully charged. Reinstall the battery and connect the positive terminal to the post then take the negative cable and hold it against the positive cable for 5 to 10 seconds and then connect it to it's post. Once you are all connected up start the vehicle and check for the condition of the system inspection. It will idle a little high and run a little rough for a few minutes until the ECM relearns the engine settings.
