Mystery Alarm Activation

[thomasmcc]

I have a 97 ES 300 that I bought in September 2006. It has the factory security system installed. Recently the alarm system has been going off by itself while the car is sitting idle. Does anyone have any idea what might be causing this?

Thanks!

Tom

[SKperformance]

Bad door pins that need lubing or trunk light.

Lock the car and try jiggling the doors and trunk to set it off.

[thomasmcc]

Bad door pins that need lubing or trunk light.

Lock the car and try jiggling the doors and trunk to set it off.

Thank you for the reply. When you say "door pins", are you referring to the switches on the door jams that activate the dome lights?

[thomasmcc]

I lubricated the door pins, and checked the trunk light. Still, the alarm has a mind of its' own and goes off by itself. My daughter says it only goes off if the car is left unlocked. I can't be sure of this.

Anyone have any other ideas? Is there a separate fuse that is only for the alarm system? If so, I could just pull that fuse. I know........out of sight.....out of mind.

I'm not sure if this is related, but the heating system is acting up when it's real cold outside. On Sunday (very cold morning) I started the car, and put the heater control on manual while still cold. The control unit would not stay on. I could hear the motors in the dash moving the dampers, but as soon as I took my finger off the control button the heater would go off. Same thing happened when in auto position. I decided to take the radio and heater control unit out. I took the control unit all apart, cleaned it all up, and re-installed it. So far, so good. If it acts up again, I plan on swapping out that control unit with the unit in my '98 ES.

Again, I'm not sure if the two issues are related. Could a bad ground be causing both?

Regards,

Tom