Chrysler Repair: 99 LHS trunk release, obd ii, fuse box


Question
My son locked my keys in the trunk of my 99 lhs and I can't find my spare.  So we had a locksmith come out and unlock the door.  Unfortunately, it set off the alarm and I can't get it to stop. Is there anyway to short out the trunk release to gain entrance to get my keys so I don't send my son to boot camp for being irresponsible!

Answer
Hi Everett,
I am not clear as to exactly what your situation is but in any case I have two manuals on the LHS that deal with the theft system to a greater or lesser degree. I have the '94 shop manual and theft alarm manual, but I suspect those are out of date because the OBD-II system came into vogue in '97 or so. I also have the '01 powertrain manual for the LHS which gives me the wire codes for the trunk lock devices. I will be receiving the '98 powertrain manual in a few days also, if the '01 doesn't seem to apply to your situation.
There are two devices associated with the trunk lock system according to the '01 manual: the "deck lid release switch output", and the "deck lid security switch sense". A single wire from each goes to the body control module which I suspect is near to the fuse box under the dash*. That unit has four plugs and the release switch output wire is a black/white wire on pin 1 of the 14-way gray plug, while the deck lid security sense switch is a violet/white wire on pin 8 of the 16-way blue plug. These are probably simple one pole open or closed switches that ground or let the wire float depending upon their configuration. You could probe each wire with a pin to get to the conducter and then test it for its resistance reading to chassis ground. Then you could either ground it if it is floating or cut the wire if it is grounded to reverse the state of the switch and see if that produces the desires effect on the alarm system. The other two plugs on the module are a black 24-way and a natural 12-way.
Roland
So that would be my best suggestion as to how to find the wires to the trunk lock set up.
I would be curious to know what happens with this conundrum.
Roland