Freelander 2 (LR2) Bonnet alarm

I've been plagued with the alarm going off occasionally when I leave the car locked. Having narrowed down the problem to the bonnet switch I decided to have a look-see and fix it.

It's an easy fix.

1. Pop the bonnet and remove the drivers side headlamp unit.
2. Close the bonnet and lock the car.
3. Locate the bonnet switch; it's up there under the bonnet latch.
4. Like me you'll probably find the lightest touch on the bonnet switch will set your alarm off, or the horn will go off when you try to lock the car.
5. Remove the plug from the back of the switch assembly (fiddly)
6. Depress the two recessed lugs on the front of the switch assembly and remove it (fiddly)
7. Mine was full of road dust / mud / whatever. I cleaned it with MAF cleaner 'cos I had some left over.
8. I then opened the spring so it stood a little bit proud of the top of the switch assembly.
9. Reassemble back to bullet point 4. The alarm should NOT go off when you wiggle the switch assembly.
10. Refit the headlamp unit.
11. Wonder how long your fix will last.

Linked mine out last year no problems since, one day I will get round to fitting a more reliable switch as the land rover ones are trash

Linking the switch out is my next move if the 'fix' doesn't work.
I don't agree the Land Rover bonnet switch is trash. The same switch is used on a lot of other vehicles and, located where it is, it gets a lot of crud thrown at it. Mine's lasted 12 years.

Seems to be a common fault. A typical limit switches in industry should be good for 100,000 operations which will outlast me.

Rank Amatuer said:

I've been plagued with the alarm going off occasionally when I leave the car locked. Having narrowed down the problem to the bonnet switch I decided to have a look-see and fix it.

It's an easy fix.

1. Pop the bonnet and remove the drivers side headlamp unit.
2. Close the bonnet and lock the car.
3. Locate the bonnet switch; it's up there under the bonnet latch.
4. Like me you'll probably find the lightest touch on the bonnet switch will set your alarm off, or the horn will go off when you try to lock the car.
5. Remove the plug from the back of the switch assembly (fiddly)
6. Depress the two recessed lugs on the front of the switch assembly and remove it (fiddly)
7. Mine was full of road dust / mud / whatever. I cleaned it with MAF cleaner 'cos I had some left over.
8. I then opened the spring so it stood a little bit proud of the top of the switch assembly.
9. Reassemble back to bullet point 4. The alarm should NOT go off when you wiggle the switch assembly.
10. Refit the headlamp unit.
11. Wonder how long your fix will last.

Click to expand...

Thanks for the detailed explanation & fix. This problem has been an annoyance for a while. My wife worked out it was the bonnet not the movement sensors triggering the alarm. I did the test you suggested which was positive but couldn’t get the switch off so I fitted a piece of paperclip to the plug to give the system a clean circuit and bound the plug with self amalgamating tape to waterproof the connection. Thanks again for bothering to post.