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Car alarm....bonnet sensor?
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The Wild Rover
 


Member Since: 07 Apr 2012
Location: Germany
Posts: 34

Car alarm....bonnet sensor?

Hi lads,

I had a few embarrasing incidents recently when the car alarm just came on even though nobody had touched the car. I suspect the bonnet sensor because when I checked on the dashboard it said "bonnet open" even though it was definitely closed. Is that a common fault? I located it on the left lock(standing in front of the car) and I flooded it in WD 40. Will that do the trick or will I have to order a new sensor? Or is there another fix?

Greetings from Germany and stay healthy everybody,

Ralph
  
Post #213219027th Mar 2020 4:02 pm
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rrhool
 


Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4398

United Kingdom 2007 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3

Yes, very common.
You can temporarily bridge the two wires with a paper clip, or a wire with spades on, to stop the alarm.
 Richard


D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.



Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone 
 
Post #213219227th Mar 2020 4:13 pm
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The Wild Rover
 


Member Since: 07 Apr 2012
Location: Germany
Posts: 34


Cheers Richard!

I just found this video which might be handy if anybody has a similar problem:



I just do the same as those guys and give it a good clean. If that doesn't do the trick, does anybody know if you can buy the actual switch assembly without the lock separately? So far I have only found the complete lock assembly, but the lock is fine of course and swapping out the micro switch looks dead easy.

take care,

Ralph
  
Post #213220827th Mar 2020 5:12 pm
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rrhool
 


Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4398

United Kingdom 2007 Discovery 3 TDV6 SE Manual Zermatt SilverDiscovery 3

Thumbs Up worth a go!
 Richard


D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.



Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone 
 
Post #213223627th Mar 2020 7:17 pm
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Yargo
 


Member Since: 25 Dec 2020
Location: Europe
Posts: 326

2014 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

I had same problem. Fixed in 5 min. Remove bonnet latch, remove switch from latch, there is a tiny metal clip - bend it up slightly and assemble.
  
Post #219704829th Dec 2020 12:16 pm
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Ranger Rover
 


Member Since: 16 Oct 2023
Location: Houston
Posts: 3

United States 2006 LR3 4.4 V8 SE Auto Java BlackLR3
Bonnet Open Message and Alarm

I have had the same problem, but only early in the morning, and only when I temperature cools.
The switch has now been replaced twice, and I have spent hours adjusting the hood height and the switch/ lock height.
All to no avail.

Thanks in advance for any help,
  
Post #235400925th Nov 2023 3:00 pm
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kajtzu
 


Member Since: 10 Aug 2017
Location: Helsinki
Posts: 6538

Finland 2005 Discovery 3 4.4 V8 HSE Auto Cairns BlueDiscovery 3

Oops, wrong thread.
  
Post #235413626th Nov 2023 8:00 pm
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