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blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17337

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

What is this for?

While rummaging about under the RH front seat of my Defender trying to find some reason for my intermittent starting problem, I have found that the wiring doesn't seem to match the workshop manual or electrical wiring/connector manuals appropriate to the VIN! In particular, I have a fuse block that doesn't feature, as far as I can see, in any tech manuals yet appears to original.

Can anyone tell me what it is for? In the first photo below it is outlined by a feeble white-ish circle added to the image. It has four wires entering it, and one huge and one less huge fuse. What do they protect? The fuse block is bolted down to the same fastening as the fog light ECU and it is difficult in situ to see the fuse ratings. It has the appearance of something fitted in the factory since it connects into bound harnesses, and there is no extra electrical equipment (except for things I have fitted myself) on the car - at least, not that I know of!

I cannot match this up to anything in the wiring diagrams or the electrical connector manual, so any advice would be welcome!

Also, underneath the spaghetti is a whitish four-pole connector (visible centre left in the first photo); any idea what this is? I thought it might be the rear door harness but am now not so sure. There is also a single fuse (30A if I remember correctly) in a loose fuse holder under the coils of wire which is the ECM fuse. The black box thingy with the label is the "rear fog guard lamp ECU" (in the old days a switch was enough for one of them)!

My vehicle is an 07-plate 110 DC, County spec, and does not have ABS/TC, aircon, heated seats, nor heated screen, hence only three relays.

First photo: mystery fuse block centre bottom circled, mystery connector left centre.

Click image to enlarge

Second photo: mystery fuse block in top centre, mystery connector bottom right.

Click image to enlarge

25th Aug 2011 3:58pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey

Blackwolf,

Very difficult to determine. Are their any output cables from the fuseblock? Pull the fuse and see if everything is functional? These are the questions that spring to mind....Spotlights.....Winch.....any other auxilliary lighting.....OEM head unit.....are you the first owner....30amp fuse is typical rating for subwoofer....do you have contact with previous owner?

Sorry can't enlighten you! If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

25th Aug 2011 4:11pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17337

I've had a closer look and one is 60A and the other 30A. Both look like factory fit since the wires on the load side run inside the main harness heading out from the seat box, they're not simply taped to it. The feed to the 60A comes from the main BJB input.

The only aftermarket electrical fitting at the moment is the winch, which I fitted, and a 12S socket - it's nothing to do with either. The head is standard and there is no evidence of any extra wiring.

I am not the first owner, and when I bought it it did have an A-bar with two 55W driving lights fitted, but they weren't connected and there is no evidence that they ever had been - no switch, relay, nor wiring.

Very strange! I am reluctant to pull them out to see what stops working, since enough things stop working by themselves without any provocation! It is a Defender after all! I'll check the wire colours since if they are original that should narrow down the circuit.

25th Aug 2011 5:20pm

KPNuts

Member Since: 21 Jan 2011
Location: Near Bedford
Posts: 45

2010 Defender 110 Puma 2.4 USW Alpine White

Don't know what they are, but they are original fit. We have them on our 2010 USW (basic spec + Elec Win + Cent Lock + Alarm battery back up).

Keith 2010 110 Utility Station Wagon
1996 110 Station Wagon

25th Aug 2011 5:31pm

kingofthesparks

Member Since: 06 Jan 2011
Location: Very close to Watford gap services , northants
Posts: 987

cut them out, you can weigh that copper wire in you know,

25th Aug 2011 5:33pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4646

Fitted to our 2008, no air conditioning or abs/tc.Looks like something that something else plugs into. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

25th Aug 2011 5:34pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

It is dedicated to the engine ECU Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

25th Aug 2011 8:35pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

It is dedicated to the engine ECU Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

25th Aug 2011 8:35pm

T1G UP

Member Since: 08 Dec 2009
Location: Bath
Posts: 3101

2011 Defender 110 Puma 2.4 XS CSW Orkney Grey

the covers missing of the fuse box.

when you put the headlights on full beam does it click?

could also be a remap box thing

25th Aug 2011 9:07pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17337

I took the lid off before taking the photo. No remap - yet.

Mystery thing is definitely a pair of fuses, one 60A and one 30A.

Daniele, there is another 30A fuse in an in-line fuseholder under the loop of wire in the photo which I thought was the ECM. Are you saying all 3 are ECM? One 60A plus two 30A (at least) for the ECM seems a bit much - 1.5kW ?

25th Aug 2011 9:50pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

blackwolf wrote:
I took the lid off before taking the photo. No remap - yet.

Mystery thing is definitely a pair of fuses, one 60A and one 30A.

Daniele, there is another 30A fuse in an in-line fuseholder under the loop of wire in the photo which I thought was the ECM. Are you saying all 3 are ECM? One 60A plus two 30A (at least) for the ECM seems a bit much - 1.5kW ?

Remember that the current peak for the injectors is closer to 35 - 40A Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

26th Aug 2011 7:29am

Merlin

Member Since: 30 Oct 2010
Location: Newmarket
Posts: 981

Pull the fuse and see what stops!

Merlin

26th Aug 2011 2:34pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

Merlin wrote:
Pull the fuse and see what stops! Merlin

Doh.....

K9F wrote:
Blackwolf, Pull the fuse and see if everything is functional?

If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

26th Aug 2011 5:57pm

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