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stuart123

Member Since: 03 Apr 2017
Location: Manchester
Posts: 207

2009 Defender 90 Puma 2.4 CSW Aintree Green

Ah, I saw that!

If I try disconnecting it and cranking the engine, what should happen?

27th Apr 2017 8:53pm

diduan

Member Since: 13 Oct 2016
Location: Central Balkan
Posts: 260

Take the ECU with you when you park

I went for a thick chain and a lock. Defender 110 SW MY2011 2.4tdci decat, no EGR
Jeep Wrangler YJ 1990 4.0. Front 78' Dana 60, Rear CUCV 14 bolt

28th Apr 2017 5:49am

nitram17

Member Since: 08 Jun 2014
Location: newcastle
Posts: 2261

X4SKP wrote:
Bigger Picture... Puma Defender (generally should be this)

Click image to enlarge

Click image to enlarge

Pardon my lack of sparky knowledge....do you have a legend for the diagrams such as wire size?as i can guess what the numbers and letters mean but im not sure!

28th Apr 2017 6:19am

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

key to reading the diagrams

Click image to enlarge

Click image to enlarge

Last edited by dorsetsmith on 28th Apr 2017 7:11am. Edited 2 times in total

28th Apr 2017 6:56am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17386

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

stuart123 wrote:
Ah, I saw that!

If I try disconnecting it and cranking the engine, what should happen?

I've never tried this but I think it is most likely that the engine won't crank, since the starter circuit is enabled by the ECU. It is however possible that the starter circuit is enabled until inhibited by the ECU after engine start, in which casse it would crank but not fire.

28th Apr 2017 7:02am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17386

diduan wrote:
Take the ECU with you when you park

In the UK that won't stop a determined serial Defender thief since he (or she) will most likely bring a 'generic' ECU with the security features disabled to plug in in place of the vehicle's own ECU anyway. It's a quick way to get round the immobiliser.

diduan wrote:
I went for a thick chain and a lock.

That is much more likely to be effective!

28th Apr 2017 7:04am

Gurmot

Member Since: 01 Apr 2016
Location: Somerset
Posts: 36

2010 Defender 90 Puma 2.4 XS CSW Santorini Black

The thief with a generic ECU is the reason I am looking at putting a voltage where it shouldn't be rather than cutting a voltage from where it should be (as with a kill switch). For example, putting a permanent voltage across the injectors so they won't pulse, would be hard to find if spliced in carefully.

Edit. If the injector is fired by a ground pulse (permanent +12 feed) then a switch putting a constant ground across all pulse connections is what I am talking about. Hard to spot and not quick to overcome.

28th Apr 2017 10:04am

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