Vectra b random alarm activation

[mashathome]

hi i bought my vectra b 2.5 v6 cdx auto to do a conversion however im using vectra as daily runner for a wee while.

it seems it would have a full standard vaux alarm with sensors on the B pillar facing front and rear, remote central locking too.

the fault, every now and again Quite often i lock the car with remote and 2,3,or even 5, mins after the alarm goes off, for no aparent reason, im not sure whats causing this. the only unusual issue i can think of is that the boot does not lock with the central locking and it uses a different key than the rest of the car (tail gait has been replaced at some point)
not sure if this would cause the fault or not as the alarm does not go off every time i lock the car.

Any help or advice is apreciated.

[boyracerv1]

best bet would be opcom, and see which sensors are being triggered

[mashathome]

i take it its a trip to an auto electrician then.

[boyracerv1]

no-one local in the club to do it for you?

[mashathome]

i m not sure im north of inverness. lol