Car Alarms: factory alarm mitsubishi diamante, 1997 mitsubishi diamante, mitsubishi diamante

Question
Hi - the battery died in my 1997 mitsubishi diamante and
when attempting to jump it, the factory alarm AND the
aftermarket alarm both go off. I can disable the
aftermarket alarm with the remote, but I can't figure out
how to disable the factory alarm (the horn + lights) even
after starting the ignition!  Any ideas?  Thank you

Answer
Ok, a bit complicated.
 This system depends on the physical action
of the door lock locking and unlocking-arming and disarming.
If you have a factory remote, that would do this to
specifications.

This can only be achieved 3 ways:

1. Use key in the drivers door, turn left,
then right to disarm and unlock.

2. Add an after market keyless entry system to emulate
the factory remote functions. I have several models
if this option suits you.

3. Acquire or, replace the original remote that
can control it as specified. This would be at the
local dealership parts department.

(This is why there is no wire you could ground
without affecting the door lock system.
A single negative pulse to the unlock wire will disarm
without unlocking, yes, but would always disable the
locking mechanism. Not good.)

So best to try the key in the door trick first.

Good luck.

ALARMTEK