Alarm goes off every time door is opened for a couple minutes

SASHA0913

MEMBER
2000 CADILLAC CATERA
40,000 MILES

Starts and drives fine. I have no factory remote. Tried turning key in door and leaving key in ignition. Doesn't help. No codes in system.

Monday, October 1st, 2012 AT 5:52 AM

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Factory or aftermarket?

Roy

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Monday, October 1st, 2012 AT 11:04 AM

KHLOW2008

MECHANIC
41,814 POSTS

Check the driver door switch. It could be faulty and the security system is not recognising that the switch has been unlocked.

By the way if you had used a code reader, you might not see any trouble codes. Only scan tools capable of reading Body Control Module trouble codes would work.

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Monday, October 1st, 2012 AT 11:04 AM

SASHA0913

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3 POSTS

@Roy ---- All factory

@khlow ---- I will try the door switch.

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Monday, October 1st, 2012 AT 5:38 PM

KHLOW2008

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41,814 POSTS

The door switch I meant is the one inside door panel whereby when key is used to unlock, it would send a signal to the BCM to deactivate the security system.

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Monday, October 1st, 2012 AT 6:12 PM

SASHA0913

MEMBER
3 POSTS

I checked all the connections inside door panel. All seem good. How would I check the door switch if it's faulty or not

Also the car has no brake lights and feels like it has no power brakes.

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Tuesday, October 2nd, 2012 AT 8:45 PM

KHLOW2008

MECHANIC
41,814 POSTS

No brakes lights could be due to a blown fuse underhood and this fuse is also linked to the security system.

You must use a multimeter to test the switch for continuity in order to understand if it is faulty.

Heavy brake pedal effort could mean a bad brake booster or insufficient vacuum boost due to a leaking or clogged hose.

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Tuesday, October 2nd, 2012 AT 11:22 PM