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You are here: Experts > Home/Garden > Auto Repair > Chrysler Repair > BCM on an '01 LHS
Expert: Roland Finston - 11/6/2009
Question
Hi, I have an '01 LHS with a bad BCM (stereo dead, climate control freaked out, NO BUS messages, all up to recently have been cleared by power drain, now the stereo won't come back). I have a dealer who can order one, and think I have located it behind the fuse box (that's my first question, am I on the right spot?). How tough is it to replace? Are there any "step by steps" I should be aware of? Is this possible for a decent shade tree mechanic?
thanks,
dave
Answer
Hi Dave,
It is not a complex process to remove and install the fuse box (called the junction block)/bcm unit, and then to separate the bcm from the block. *The one 'trick' is that when you first turn on the ignition to start the car after the bcm is installed you want to wait for at least 15 seconds before trying the starter to allow the bcm to communicate with the pcm to learn the VIN. But you do have to have the vehicle theft security system 'enabled' using a diagnostic readout box III at a dealer, if you want to keep that feature. I would be interested to know what the dealer charge for just programming the new DRB, and what it would be to do the removal and install as well. I can't see how the mechanical issues in removing and installing should take more than an hour.
That latter part looks pretty simple: disconnect the battery, remove the end cap of the dash, disconnect a couple of screws that hold the lower dash panel and then pull rearward to release the clips and then disconnect cable from hood release handle and wire from deck lid release, remove the knee blocker, remove the under-column air duct(s), remove four screws that hold the modules, disconnect wire harness connectors from the junction block and the bcm, remove the module from the mount, remove bcm wire connectors and rke antenna connector, and take out the module entirely. Then you remove the three screws that attach the bcm to the junction block and slide them apart (the two are electrically connected at the interface) and you remove the three screws for the rke module and transfer it to the new bcm. Then you reverse the process.
That is an outline of the process. Talk it over with the dealer.
Roland
PS:I have modified my answer from how I had it originally. I found the procedure for installing the BCM for the '01 LHS and it indeed appears to be the case that you should be able to install it yourself and start the car, but then go to the dealer to 'enable' the theft security system using the DRB III.
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