Thread: Car does not lock. Horn sounds instead of locking.

start with the bonnet switch.

Mine will lock with bonnet up. The horn sounds but it still locks.

I would still check the it though. If that is good I would then start by checking each door lock switch.

I would start with the drivers door as it is the most used. The BCU thinks there is a door open when there isn't.

Originally Posted by discorevy

start with the bonnet switch.

Start with the bonnet latch, mine is sensitive that it needs to be slammed for it to register its closed position.

Originally Posted by imaz

Start with the bonnet latch, mine is sensitive that it needs to be slammed for it to register its closed position.

so adjust your bonnet stops so you don't have to slam it.
The latch is just a latch , the switch near the airbox is what signals the BCU.

Our Defender wouldn't lock when the bonnet switch failed, but I'm not sure if that is your problem.

The battery cover was out of place, holding the bonnet up enough to stop the bonnet switch switching.
I did not notice this last night or this afternoon.

Originally Posted by Bohica

The battery cover was out of place, holding the bonnet up enough to stop the bonnet switch switching.
I did not notice this last night or this afternoon.

That's great. Love it when the fix is simple and cheap.

I'm glad that the bonnet switch gave a legitimate warning. I got caught with the same symptoms once when a spare key was hiding in my wife's handbag in the boot. The car absolutely refused to lock. It took a few minutes to figure out the cause of the D4's refusal. This was not long after I suffered the dreaded door-lock-sticking syndrome so I was a bit concerned that something else had failed...