I hope someone might be able to point me in right direction, as my 147 alarm is playing silly b******. A few weeks ago it started doing a double flash when I locked the car and set the alarm on but nothing else. Then one evening a few days later, the alarm starts to go off at 3 in the morning - the neighbours loved me!! Guessing it might have something to do with all the crud & grease in the bonnet lock, I degreased all that and gave it a good clean. Regreased lock and it seemed to cure the problem. However, every time I drive in the rain and then set the alarm, the bl**** thing starts going off. If its dry, no problems and I can't even replicate the fault by washing the car! Smacky has checked all the systems and there are no faults showing, so now I am baffled.
Could water be getting in somewhere and shorting out some wiring? In which case, where would I start looking??