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Peregrine_White

Member Since: 05 Feb 2019
Location: North West
Posts: 68

2008 Defender 90 Puma 2.4 SW Keswick Green

Help Needed Wiring work light

Hi all,

I am attempting to wire in a lazer utility 45 light as a work light. I am trying to replace the switch provided in the harness with the landrover front fog switch. I understand that it is negative switching however currently apprehensive. I am working off these two diagrams but need some advice before I start hacking into the existing loom to make sure I'm doing it right.

Click image to enlarge

6th Jan 2021 7:15pm

stew 46

Member Since: 26 Jan 2012
Location: Wadebridge ,cornwall .
Posts: 561

2010 Defender 110 Puma 2.4 USW Bonatti Grey

I got one of these from Amazon , might need to extend it a little but it’s all there and that makes it easy for me

Click image to enlarge

6th Jan 2021 7:34pm

macfrank

Member Since: 05 Nov 2015
Location: somewhere in the north
Posts: 986

2015 Defender 110 Puma 2.2 SW Keswick Green

Do you already have that fog light switch? You're question is how to wire that into the loom?

That amazon loom probably won't help, as it's likely switching the positive wire.

I guess these are positive-switching, too?
https://www.mudstuff.co.uk/products/genuin...h-rearwork

6th Jan 2021 9:39pm

Peregrine_White

Member Since: 05 Feb 2019
Location: North West
Posts: 68

I already have the loom in the diagram above and I also have the switch, I have extra cable etc for wiring the switch and all the right connectors it’s just a case of how to adapt the wiring of the loom to suit the switch.

6th Jan 2021 9:57pm

macfrank

Member Since: 05 Nov 2015
Location: somewhere in the north
Posts: 986

So you'd have to wire it as shown in this complete diagram:

This may help understanding the circuit:

So basically the black wire from the relay's coil (85) goes to pin #1 of the fog light switch.
It will now provide ground to the relay by switch pin #4. You can remove the red wire from (30) to the switch from the loom. Now the other end of the coil (86) needs permanent +12V, same as (30) (or ignition switched or depending on main light switch as (not really) shown in the diagram, depending on your needs).
When the relay is triggered, +12V from (30) is routed to (87). You can leave that as it is, but the ground wire returning from the lamps must not be connected to (86) anymore, but just to ground. Lights are on now

For the amber switch LED to work with the lights, (87) needs to be connected to pin #5 as well.
And then #2 for switch illumination. Done.

Please double check before cutting anything, as I need my beauty sleep now ...

6th Jan 2021 10:47pm

Peregrine_White

Member Since: 05 Feb 2019
Location: North West
Posts: 68

Perfect, I will have a play this weekend! Thanks for the help

7th Jan 2021 3:47pm

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