Chrysler Repair: 1990 chrysler imperial theft system, jumper cables, chrysler imperial

Question
Dear Sir, I am a single disabled parent and received a Chrysler imperial. My only knowledge of its operation system regarding the anti theft device is from the previous owner. I have no book on this system and can't afford to buy the book. My problem I was told that when I lock the care the anti theft alarm will set and when the passenger front door is messed with it will set the alarm off I was told to go to the drivers side and turn the key and this will disengage the horn ect. This has worked, however recently I believe the alarm went off and it was not turned off and after charging the battery it acts as if something is shutting the battery off to start the car while I have played with this for hours I can start the car but something is tripping the engagement of the alarm then cutting of starting the car. First off can this system be in anyway disabled. By fuse or disconnection? Then if it cant is this normal for the car to prevent the driver from starting the car after an alarm was engaged and not re set, and do you no how I can get it back to it's original state. My belief is that the alarm went off, I don't know for how long do you if it will stay on until the battery dies? Anyway I heard an alarm it was only 5 minutes then intermittent after that for about 10 minutes I have a brand new battery in the car. When I attempted to start it 2 days latter even with jumper cables it seemed to have all the power lights ect and activated the flashing alarm and everything but when I tried to start it after 40 minutes of charging it from another care it refused to due anything. I would have all power interior and exterior then turn the key and here a clicking like a starter noise and then all lights go out and nothing works again. This was 24 hours ago and when I locked the car last night their was not power to anything. This morning It started right up and I did it 4 times and figured after pulling all the fuses it may of restarted this anti theft device. But 1 hour later I go out to the car and it wont start no power now I no I am not crazy and this is related to this anti theft device but do you have any information on how to either understand it or disable it. any information would help thank you Cathy

Answer
Hi Katherine,
The only manifestation of the anti-theft system when it has been alarmed and not reset is that it allows the engine to start BUT then in approximately 2-3 seconds the engine will be shut off. So that is the clue to alert you to that being the situation.
The clicking when you try the starter or the total non-response/no power has nothing to do with the anti-theft system. So when you have that situation where the starter won't work it has to be:
the gear shift is not in either Park or Neutral, a too discharged battery, or a battery whose cables are poorly attached.
The attachment issue is:
either at the battery clamp to battery attachments themselves,  or at the other ends of those cables (- battery post clamp cable has 3 wires but only two, the fattest black one needs to be cleanly attached to the engine at the uppwe side closest to the front of the car on the cylinder head, and a medium thickness black cable has to be attached to the body at the inner fender just behind the battery in the engine compartment.
The + post battery clamp wires have a fat red one that has to be attached at the starter motor and a fat black one goes to a torpedo- shaped disconnector and from there to the fuse box. But verify that the + clamp it self is tight on the battery.
Note: to do this basic battery cable checking safely, start by disconnecting the - post clamp of the battery. Then check out the - post connections I described, then check out the + post connections I described, and finally reconnect the - clamp to the - post of the battery.

Once you have it set up so that the starter motor will operate and the engine will start and run, then the anti-theft is not alarmed. If instead it stops after 2-3 seconds, then you have to use the door lock key to unlock either or both the passenger door or the driver door. It sounds like the disarming is not working from the driver door so use the passenger door key lock to disarm the alarm by turning the key to the unlock position and back to neutral and remove the key. Turning to the lock position will arm the alarm again, so if you accidentally do that, just put the key in and turn it to the unlock position and remove.
To disarm the system, if neither front door unlock will do it, there are a couple of wires at the plug of the anti-theft module that you pierce through the insulation with straight pins, then touch the  pins together once, and then separate them. That replicates lock/unlock of the doors. More about that below.  
To get to the anti-theft module either to disarm it or to remove it:
Remove center support/floor console as necessary. (Floor console removal, if necessary, is described as:open upper storage bin door. Remove two screws attaching front wall of storage bin to mounting bracket. Remove console and drawer. Remove two screws attaching mounting bracket to lower instrument panel. Remove mounting bracket).
Disconnect glove box/ash receiver wiring connectors
Remove the glove box by removing all the 11 screws around the opening and and remove it.
Then look above the glove box opening and there is a crosspiece with possibly several modules on it. Remove the 3 screws on the bracket that attaches it to the instrument panel and lower it down for convenience.  The theft module has a natural color plug with 21 pins. The black/light green wire on pin 10 and the dark green/orange wire on pin 8 are the ones you want to try the pin touch technique to. See if the light goes out. (These pin numbers apply to the situation where your car has a normal instrument cluster; if it is digital electronic cluster tell me so and I will give you the pin numbers for that situation.)
Then see if it starts. If you get it started, and you want to remove the system entirely:
WHILE THE ENGINE IS RUNNING pull the plug out of the module, that will safely kill the system, if you want. NEVER pull the plug UNLESS the engine is running.
If instead you just want to avoid the false alarming problem in the future (rather than pulling the plug for permanent removal) then NEVER use the door key or the interior power door lock switches when you exit the car because all those will set the alarm. Rather secure the doors by means of the mechanical push-buttons on the interior doors which thus circumvents ever setting-up the alarm system.  
Roland