Ph3 Alarm Sensors

[Alan_M]

Alan its all dependant if your alarm is factory or dealership fitted. Some models came with a alarm as standard from the factory but it was an option on all models for an alarm. This was dealership fitted and is completely different to the factory one. The factory one uses the microswitch as Cully says, the dealership one uses a plunger switch usually mounted in the top of the slam panel.

I've banged in the chassis number to ServiceBox, and tells me it had no alarm fitted from factory. So I'm guessing it's a dealership fitment. But, there is no plunger in sight. 

Depends how quickly the alarm goes off. The alarm isn't active for the first 30-45 seconds after locking to give everything time to go to sleep and for the draw to settle right down. Once it does settle, the alarm monitors voltage for any rise. Also, if theres anything aftermarket in your car, it could be causing a fluctuation in voltage if its trying to turn on/off whist the car is locked.

According to my instruction booklet, the alarm lets doors, boot, bonnet, ignition settle for the first 5 secs before arming those, then the ultrasonics settle for 50 secs before arming. 

I've a few avenues to head down to sort this out, but the lack of a bonnet shut switch won't help. I'll have a play tomorrow.