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Tea_and_Biology



Member Since: 03 Jun 2024
Location: Oxford
Posts: 10

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Aintree Green
Kill Switch / Sequence Immobiliser for 2007-2011 Defender
Hey folks!

Just bought my first landy (hurrah!) and I'm in the process of, amongst other things, sorting out assorted security systems - and hoping for a little help!

Essentially looking for a simple system - a hidden kill switch or similar - that would kill the engine after a short while if not flipped correctly. Be it just after starting the ignition or, say if already running, one could flip the switch (to 'off') and after a short period of time the engine will conk out. It has to be fully manual - no cards/fobs/apps etc. - and be accessible from the driver's seat. Long story short, I'll be overlanding across Africa and want it as an anti-theft / anti-hijack system; in the worst case scenario, should someone grab my keys, they should be able to drive off a short distance before being completely immobilised.

In terms of what's on the market, was looking at the Autowatch Ghost immobiliser (where you have to hit a certain secret sequence of buttons on the centre console / dashboard before setting off) - though, alas, despite some mixed messages it appears said CAN-bus system is incompatible with my model (though some others say it is possible to do, albeit outside recommended set-up; has anyone done this?). Would be good for the insurance though.

Otherwise is it just DIY? Any advice, suggestions, or successful modifications? Any insight would be appreciated!; thanks!

P.S. It's a Defender 110 2.4 Puma - 2007-2011 if that helps?
Post #1036377 3rd Jun 2024 2:26pm
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Rosco



Member Since: 03 Dec 2010
Location: Burntwood
Posts: 1832

United Kingdom 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red
I dont know about a timed kill switch, but you could look at something like this https://lrd-track.co.uk/products/starter-inhibit-loom

Hidden rocker switch prevents cranking when activated. Or swop the switch to a non-locking rocker so has to be held to enable cranking. 2007 - Stornoway Grey 90 XS SW - Gone
2002 - Black Discovery II - Gone
2014 - Montalcino Red 110 XS SW
Post #1036379 3rd Jun 2024 2:42pm
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steveww



Member Since: 05 Jan 2022
Location: Uppingham
Posts: 559

United Kingdom 2015 Defender 110 Puma 2.2 XS CSW Bronze Green
I don't know of anything like that on the market. It's certainly easy enough to fit an extra switch to prevent engine start.

It would be easy enough to make one with a delay with a little wiring, switch and a delay relay.
Post #1036384 3rd Jun 2024 3:17pm
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macfrank



Member Since: 05 Nov 2015
Location: somewhere in the north
Posts: 1035

Germany 2015 Defender 110 Puma 2.2 SW Keswick Green
Like this? Cool
?si=y_F69Zc2IkKzTkaB
(can't find the scene where she actually uses it)

If it's not a sequence but just a hidden switch with a timer that kills the fuel pump, it should be easy to build (google NE555 for example).

Problem IMHO opinion is safety. You don't want it to activate in a critical situation.
That's why remote or conditional kill switches usually (should) only activate when the car is stationary, i.e. they use speed as additional condition. In remote areas, however, it could take a while until the next stop...

Even then a DIY solution should be of high quality to avoid accidental (literally) activation.
When you designed this as a product you'd do a failure analysis and design the system accordingly (probably involving indepent redundancy).

That's also why I have refrained from installing this in the cabin https://www.security-discount.com/en/home-...atterypack
Twisted Evil

Disabling the starter relay doesn't have that safety issue but in case of hijacking will only work after they have stopped the engine, which is likely when they are in their den where they have enough time to find the switch :/
Post #1036400 3rd Jun 2024 6:36pm
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Joel



Member Since: 18 Oct 2020
Location: Rotherham
Posts: 71

United Kingdom 2002 Defender 110 Td5 DCPU Santorini Black
I have a Clifford 650MK II alarm, who have an additional BlackJax feature, you enter a code by button presses on a separate button pad.

It activates when you start, but also if you stop for more than 1 minute and then move off, it prompts for the code again, like an anti hijack feature. It will cut the engine the next time the vehicle stops if the code isn't entered.

The Clifford alarm also has glass break, proximity and tilt sensors, plus it's tied into a GPS tracker that is alarm company monitored.

The whole system was about 800 quid, but well worth it IMO.

I don't know where you are but I can highly recommend source sounds in Sheffield who did my install.
Post #1047859 6th Oct 2024 11:43am
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kmac



Member Since: 07 Oct 2009
Location: Middlesex
Posts: 1308

United Kingdom 2009 Defender 110 Puma 2.4 USW Santorini Black
macfrank wrote:

That's also why I have refrained from installing this in the cabin https://www.security-discount.com/en/home-...atterypack
Twisted Evil



Is that legal in the UK?
Post #1047929 7th Oct 2024 9:35am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17248

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
No, not a chance! Tear gas is a definite no-no in private ownership in the UK and will get you into extremely deep trouble.

Nice idea though. Thumbs Up
Post #1047930 7th Oct 2024 9:42am
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gilarion



Member Since: 05 Dec 2013
Location: Wales
Posts: 5106

Wales 2007 Defender 90 Other CSW Trident Green
Run a hidden toggle on-off switch to the fuel pump. It is an easy job and very effective. For those who like Welsh Mountains and narrow boats have a look at my videos and photos at..

http://www.youtube.com/user/conwy1
Post #1047935 7th Oct 2024 10:29am
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