Alarm horn and indicator problems

[StickyWickett]

Couple of days ago I was driving along happily when suddenly a horn in the rear left corner starting going mad and the only way I could turn it off was by disconnecting the battery. It stayed off when I reconnected but to be safe I disconnected the horn. On the way home after that the indicators started playing up, any bump or wobble and they'd randomly light up individually or both at once without any clicking. Then when I got home I found the central locking no longer works!

I have a sneaky suspicion this may be down to the old Laserline alarm that has been fitted which has been playing up since about 2 weeks after I got the car. Anyone had an experience like this before or can anyone hazard any educated guesses as to the problem?

Ideally I'd like to take this heap of **** alarm out but I'm guessing the ECU for it will be hidden away in the depths of the dash with spliced wiring everywhere so I'm dreading that!

[UrS4boy]

Central Locking Pump Pin-outs

Can't help with the aftermarket alarm but I can lead you to OE central locking info, including the link to the alarm horn on Pin 6/4 or the T6ae connector:

More info: http://forums.quattroworld.com/s4s6/msgs/284009.phtml

[StickyWickett]

Thanks bud every little helps.

[simon20vq]

I had a similar problem after removing the door lock to match the key to the ignition. I had not fitted the micro switch part back correctly so the alarm was not registering the fact the door was locked. Could be you need to remove the door card and wd40 or replace the switch. see if you can hear the lock click when you lock/un-lock it. Just an idea.