Car Alarms: Car Alarm wont disarm, mercury villager, valet mode

Question
1996 Mercury Villager - I think factory installed alarm (horn, lights with flashing led under dash at left knee. I just changed my car battery. Now if I open the door or hood the alarm goes off. The un-lock is not disabling the alarm (the LED continues to flash 3 blinks at a time).
Please help. Thank you in advance.

Answer
It's an after market system from your description.
Probably dealership installed when
it was purchased originaly.

It's in long tamper mode I think.

To start, look under the dash area for a button or,
a toggle switch. When you locate it, turn on the
ignition key, press and hold in the button (little
spring loaded micro button, red or black possibly)
until the alarm chirps 1 time. This should over ride
the system, and only the keyless entry part,
if installed, would still be operating.
The LED (light emiting diode) light in the dash
should also go on solid.=VALET/OVERIDE

This stops the alarm except for the keyless
entry if installed. The next step is to
either remove the alarm or, try to identify,
and get new remotes for it.

But once in Valet mode, it will allow the car
to start and operate like there was no alarm at all.

Let me know how it goes.

ALARMTEK
CARALARMMAN.COM