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Re: alarm system draining battery
The Grand cherokees are famous for the alarm modules malfunctioning. If you simply remove the module the Jeep probably will not start. It will most likely have to be replaced and this requires removing most of the panels from the dashboard. I would also check the relays for the system which are located under the glove compartment. One of these could be shorted out causing the system to drain the battery.
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It sounds like you have a malfunctioning alarm system. If it is an aftermarket system, you should simply turn it off. If it is a factory alarm it would really be best to take this to a dealer. In the mean time, to prevent battery drain, you can disconnect the black battery terminal at night when you park the car.
The alarm system is not causing this, that much i know for sure. How many volts is the drain? Anything over 8 volts and 300ma is considered a drain. The most common cause of a drain is interior light being left on or coming by themselves due to defective door switches, this includes the lights in the visors for the vanity mirrors and the glove box and under the hood if so equipped.
The PCM needs the module inline in order to get the correct input in order to allow the ign and fuel to turn on. There is no easy way for what your asking. Best bet is to get it diagnosed and fixed. It will be alot cheaper. There is no info on how to remove the alarm from the system. If there were, any thief would have access to it. Only info is to repair it. . I'm not sure its even that module thats your problem. You may have body control module and a lighting control module. Both of these are known for draining batteries when the key is out of the ignition.
If it were easy to bypass it wouldn't be security.
Before you disable your alarm try this, disconnect the alternator field plug over night, check battery voltage at the battery before you disconnect the plug then disconnect and leave alone over night, make sure you have at least 12 volts when you disconnect the alt.
Recheck battery voltage in the morning before you reconnect the field plug...
I suspect you may have a leaking diode in your alternator's internal regulator, have seen it many times on your model... Certainly worth a try. Let me know how it turns out....
The Ignition module of your Century.
Is located UNDER THE IGNITION COILS.
The ignition coils are tie on the ignition module.
But LET ME tell you, something about your problem with the battery,
The Ignition Module is the LESS posible to Drain the Battry,
Because only use 3 connector, and the Ign. module is powered
with the ignition switch, is mean when you Turn the key to OFF.
All the power of the Ign. module Cut off.
If the ignition has no power when the car is OFF, impossible
Drain the battery,
I recomend check that all the lights went off after you close all the doors. Check the glove box light, Trunk light.
Some times the Factory Radio on chevys give up this problem, If the car is equipaded with a Aftermarket alarm.
You should check the circuit.
I'm a mechanic,
I hope this help on your problem.
Thank you for use fixya...