Here's a weird one.

My alarm keeps going off - this happens.

But, I've noticed it's almost the exact same time each day 12:40.

When I go to unlock, deactivate and put the ignition on, the dashboard tells me the bonnet is open, which it is not.

What could be causing this? Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

bonnet switch, test it by connecting the two wires together.. ... - .- -.




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You can adjust the bonnet fit. Spray the alarm widget with wd40 too.

I did the latter. No change.

With the bonnet open and a hammer resting on the switch the dash message goes away, so the switch does work at times, yet for some reason trips in the middle of the day only. Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

Your getting warmer - see what I did there  Geoff

Why would the warmth of the middle of the day trip it??

It's also the only thing I can think of that occurs at the same time of the day. Sunlight! Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

12:40 exactly suggests something else maybe, but I found that "at the going down of the sun and in the morning" my alarm went off.

Lawrence Binyon gets credit for the bit of my post in quotes.  Geoff

well, 12:40 thereabouts, it was only today it clicked that it was pretty much the same time. I havent checked every day and can't, as the car is mostly in Heathrow car parks. Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

You have a black car, the sun is shining, the metal / plastic deforms, the alarm goes off

try parking in the shade

I don't have any shade any more  Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

I think the fix I described earlier will sort it - it did mine  Geoff

RRUK wrote:

I don't have any shade any more

Buy a taylored car cover (LR do them i think), it'll be lighter, reflect the heat and stop the birds crapping on your car.

(this isn't really a serious suggestion)

Just had that happen to me - on holiday in Spain! Bonnet showing open when it wasn't and alarm kept going off. Had a new bonnet sensor fitted today - hopefully that's sorted it. 2005 L322 Vogue Gold gone
2006 L322 Vogue Black gone
2011 L322 Vogue Silver gone
2011 L322 Autobiography Black gone
2015 L405 Autobiography LWB Black gone
2019 L405 P400e Range Rover Autobiography LWB Eiger grey / black roof gone
2001 P38a 30th Anniversary Wimbledon Green gone
2019 L405 P525 Autobiography LWB British Racing Green

Unnecessary quote removed

This happened to me the bonnet is not keeping pressure on the switch causing the alarm to activate. I put some sticky tape on top of the switch increasing the switch height solved the problem a very common fault 07 Vogue SE Java Black 3.6 TDV8
Black Leather heated/ cooled seats
Piano black trim deployable side steps
13 L405 4.4 Autobiography

I used a self adhesive wheel balance weight stuck under the bonnet until got replacement switch.... That worked.