Alarm failure on passat 2001 2ltr

[ST.Alban]

Hi,

After much pain with similar problem ( yes I also checked the perfectly dry convenience module), I got around by squirting a contact cleanner and then wd40 on all my door locks and handles. Apparently one of the microswitches would seize or not close properly and therefore random alarm. You mention the alarm triggered again after shopping so boot lock may need a squirt....

Hope it helps. I got up to now 1 year free of random alarms after the procedure.

Regards
Scratx

Ps.: Also clean the sunroof (if you have one) water outlets on the inside of front doors, and near the hinges of the engine compartment door.There is some muck there contributing usually for water no to drain from under the battery.

Sweet, i'll try that and hope it sorts it out. I had disconnected the alarm horn but today i found the car battery flat and had to jump start the car.

[ST.Alban]

All done now,

i sent the car to an in car entertainment and security specialist in london, after a lot of old fasion testing without Vag-Com we found that the Convenience Unit is fine and not defective, as was told by the VW dealer, but the Alarm Siren was not. Water ingress had caused it to fail. Got it done for £100, new alarm siren from VW and fitting.

Thanks to all of you guys for the help as it really saved me from £500 pounds theft from VW