on a mk4 the horn is under the plastic by the wipers so no cutting the wire the lights will still go off tho.iv taken mine of but still flashing lol so now iv taken the sounder unit off from under the wing passinger side to see if its the back up gess it was as thay was creoded so now iv got to make up a new power suply.hop this helps.?
therealshadowuk walsall
May 2012
Cut the red wire leading into the siren.
It will stop the horrbile noise but it will still let the flashers go.
So it will be a visable deterrant.
Dave
January 2010
check the elements on the windows then get some metal element paint to reconect the join
jason
January 2010
drive it into a lake
danny ashtray owner with 4.30am alarms
December 2009
Has the alarm been giving a series of short 'beeps' when you turn off the ignition? If so it's probably the back-up battery in the power sounder unit failing.
A weak car battery will also cause false alarms.
Check the contact switch under the bonnet, it may need adjustment or replacement.
The quickest, simplest way to find alarm problems is to take it to a garage with the appropriate diagnostic equipment and have the Alarm Activation Log read, this will tell you which sensor is tripping the alarm.
bbc333
June 2009
I have exactly the same problem I have fitted a new car battery but that did not help Good luck
Barbara Peel
June 2009
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