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Electric Fuel cut off switch?
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3
Electric Fuel cut off switch?

Hi all

Would this eBay item work with a button hidden somewhere inside my car please?

https://www.ebay.co.uk/itm/324237433903

I’m wanting to immobilise as per previous threads. I got a fuel valve tap thing but it’s still a burden reaching underneath the car. So ideally I’d like a hidden switch somewhere inside.

Thanks In advance
 Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales 
 
Post #222942210th May 2021 6:55 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

No, it's totally over the top for what you need!

All you want to do is interrupt the positive to the lpfp for which a decent quality flick switch will suffice.
You can take it from the fuse box thus cutting the supply to the fuse. Then a bit of imaginative cable routing and hidden switch should be enough to delay any would be thief!
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #222943010th May 2021 7:29 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Hi I can’t see what ipfp means on Google in relation to the car. Am I right thinking you mean put a switch on the electrical control to fuel system?
 Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales 
 
Post #222943210th May 2021 7:37 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Low Pressure Fuel Pump, its the pump in the fuel tank which feeds the High pressure (injector) pump !

You can put a switch on the electrical supply to this pump. Thumbs Up
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #222943610th May 2021 7:58 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Thanks!

Am I right in thinking it’s the black box 2nd down in fuse box, as is in this video?



Also do you have a brand / model of switch you recommend please?
 Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales 
 
Post #222943810th May 2021 8:04 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

You don't have to go via the relay, though you can if you wish. Remember, all you are doing is cutting a critical power feed wire. It can be on anything the car must have in order for it to start such as cam sensor, fuel pump, starter solenoid feed, etc etc.

The switch just needs to be 2 pole min, decent quality, capable of say 30A load and will fit/suit your intended hidden location. It can be flick type, rocker, push, etc doesn't really matter.

Work out what component/fuse you are going to intercept, it can be in either of the fuse compartments, or elsewhere! Then find the best/safest route from there to the intended switch location.

Keep it simple, and keep it hidden Thumbs Up
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #222945310th May 2021 9:39 pm
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
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United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

Must be proper on/off, not momentary. I'd also avoid magnet operated unless you're 10000000% sure you won't knock the magnet.

Mustn't be where you could switch it and not realise.
 .


Dean
====================================

2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer Sad ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms 
 
Post #222945710th May 2021 9:51 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Hi I’m not electronically minded to the stage where I’d know how / what cable to do.

By any chance could you send me a pic of one you’ve done previously please?

Or a video of someone that’s done successfully please?
 Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales 
 
Post #222948911th May 2021 9:13 am
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Iguana
 


Member Since: 14 Oct 2013
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Ukraine 

Another option is to go to an Auto electrician and ask them to set one up for you, shouldn't be that expensive Thumbs Up

I'm planning on adding a switch, possibly two to my old Defender this weekend, but much simpler with simpler electrics Thumbs Up
 Iggy/Ieuan

Current LR =
2015 RR Sport Autobiography
&
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- Gone but not forgotten:
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MY05 Disco 3 'S'
MY14 FL2 HSE manual in Blue
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Post #222949511th May 2021 9:49 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12662

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

must be something amongst these ... but I've not tried them myself.

https://www.youtube.com/results?search_que...off+switch
  
Post #222949611th May 2021 9:50 am
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BradC
 


Member Since: 29 Apr 2019
Location: Perth
Posts: 118

Australia 2008 Discovery 3 TDV6 XS Manual Izmir BlueDiscovery 3

PROFSR G wrote:
No, it's totally over the top for what you need!

All you want to do is interrupt the positive to the lpfp for which a decent quality flick switch will suffice.
You can take it from the fuse box thus cutting the supply to the fuse. Then a bit of imaginative cable routing and hidden switch should be enough to delay any would be thief!


Hardly. The feed pump on the HPFP will comfortably allow you to drive at a reasonable clip with a light load with the LPFP completely dead. Sure not going to stop a car theif. If you want to do that, interrupt the +12V feed to the VCV/PCV pair.
  
Post #222950611th May 2021 10:50 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

I have yet to see a D3/4 drive with a dead lpfp, although it might be possible there is enough residual fuel to get it moving, but it will die.

In any case he has plenty of other options.
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #222952911th May 2021 1:13 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

cmb2020 wrote:
Hi I’m not electronically minded to the stage where I’d know how / what cable to do.

By any chance could you send me a pic of one you’ve done previously please?

Or a video of someone that’s done successfully please?


If you are in any doubt regarding fitting such a device then you are best served to have a professional
do it for you.

There is no room for mistakes here as the consequences could be dire! It's a small job and the cost of getting it done by a pro is minimal. The cost if you get it wrong though could spell the end of your D3!
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #222953011th May 2021 1:24 pm
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KevinD3
 


Member Since: 05 Aug 2020
Location: Sutton Coldfield
Posts: 1188

England 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Having had my instrument cluster go bad and sent it away for repair has given me a thought.
Cluster isn’t powered up when car is asleep (I don’t think) and if a dry solder joint will prevent the car from starting, then would a switch that interrupts the power to the cluster work to prevent some toe rag using my keys to take the car? It’s also handily already in the dash so fitting the switch would be simple too.

Any thoughts anyone?
 2008 HSE Stornoway Grey

My Wife thinks the D3 is a hobby, The D3 thinks the wife is 💕 
 
Post #223631915th Jun 2021 10:31 pm
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