Terryvision
Veteran
99% of the time its the bonnet switch, it can be unplugged without any issue... unplug it set the alarm see if it goes off 
If no alarms.... it's your switch
If no alarms.... it's your switch
Alarm keeps going off randomly
- Thread starter aj4937
- Start date
Charlesell
Member
I'm having an alarm problem at the moment too. I have been locking the car on the key for days as it's the only time the alarm doesn't go off. But immobiliser still works.
2.2i SE (ish lol) Roadster. K@N cold air induction, Powerflow twin freeflow exhaust, 18" 255 Deep dish alloys, race clutch,gearbox, tuning and several remaps
And Red Grills
But me alarms a bitch lol
2.2i SE (ish lol) Roadster. K@N cold air induction, Powerflow twin freeflow exhaust, 18" 255 Deep dish alloys, race clutch,gearbox, tuning and several remaps
And Red Grills
But me alarms a bitch lol
Hi All.
I developed this problem in the last month and as it's not good policy to leave a car unlocked, I thought I would do some research.
Reading this forum and other forums, it seems quite common that the fault usually lies with the bonnet sensor. This can be found at the back of the bonnet between the two diagonal torsion bars. It's similar to the press buttons you would find in old car doors by the hinges.
This is how I fixed my problem:
1. Take out plug on bonnet sensor. Shut bonnet and lock car. If alarm goes off the bonnet sensor is not your problem. If alarm is silent as it should be, the sensor is the problem.
2. Lubricate sensor, plug in and tape down sensor fully. Leave bonnet up and lock car. If alarm goes off, you need to replace sensor (about £25, me thinks). If alarm does not go off, it means that the bonnet is not pressing down hard enough on the sensor to make it work properly. I found that by bending the switch mounting bracket very slightly up towards the bonnet, it solved the problem Don't buy a switch until you've tried this first.
I developed this problem in the last month and as it's not good policy to leave a car unlocked, I thought I would do some research.
Reading this forum and other forums, it seems quite common that the fault usually lies with the bonnet sensor. This can be found at the back of the bonnet between the two diagonal torsion bars. It's similar to the press buttons you would find in old car doors by the hinges.
This is how I fixed my problem:
1. Take out plug on bonnet sensor. Shut bonnet and lock car. If alarm goes off the bonnet sensor is not your problem. If alarm is silent as it should be, the sensor is the problem.
2. Lubricate sensor, plug in and tape down sensor fully. Leave bonnet up and lock car. If alarm goes off, you need to replace sensor (about £25, me thinks). If alarm does not go off, it means that the bonnet is not pressing down hard enough on the sensor to make it work properly. I found that by bending the switch mounting bracket very slightly up towards the bonnet, it solved the problem Don't buy a switch until you've tried this first.
south yorkshire
Sounds like a bad battery to me.