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2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

2011 Defender 90 Puma 2.4 SVX Station Wagon Santorini Black

High beam wiring question. LED light bar

Ok, have a LED light bar mounted up top, at present it’s run off a separate switch, independent of the high beam. Yes, it is E marked, so road legal.

I want to wire this LED into the high beam, as well, so it works on the high beam, and the switch. I know where the feed wire is for the high beam...

So, the question is, where do I tap into the LED loom with the high beam feed, one of the power feeds off the loom before the switch?

Someone knows

Thanks

12th Nov 2019 8:29pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4788

Do you want it to come on with the main beam all the time or manually on when selected?

Or

Switchable between on with main beam, off or on manually?

The first one you can just tee a relay activated by main beam to the positive wire for the light bar.

The second one you need a 3 way switch with one pole to permanent live, one to a relay activated by main beam and the common to the positive of the light bar

So option 1 will be as you are currently but the light bar will alway come on with main beam or be switched on manually. (no isolation)

Option 2 gives you ON, OFF or on with main beam

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
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12th Nov 2019 8:37pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

Option one is the way to go it would seem.

So, just tap into the Live feed on the switch side, add a relay back in to the high beam feed then.

The other way would be a pain for me now, as the switch is now up on the roof console, all wired up and the headliner back on, not taking all that down again.

Thanks.

12th Nov 2019 8:48pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4788

Yes option one will be fine.

The switch physically isolates the main beam from the switch feed and the relay will physically isolate the main beam from the switched live.

If you were to flash the lights with the light bar manually on it would make no difference

12th Nov 2019 8:56pm

2010Blackdefender90

Member Since: 07 Jan 2018
Location: London
Posts: 562

Awesome, thanks

12th Nov 2019 9:44pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17492

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

In case it is of interest, my light bar is wired using a modified Defender light switch (the off-side-head stalk switch) mounted in the unused stalk position on the right of the column. The modified switch controls the light bar, centre position is off, towards driver connects to main beam, away from driver is permanently on.

The switch mod is straightforward and used a failed switch from the scrap bin.

12th Nov 2019 10:50pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2187

Afaik it isnt legal to use any auxillary lighting on the road unless the lighting sits inline (within reason) to the factory fitted headlights.

I may be wrong but i do remember reading something along those lines. Instagram @defender_ventures
Empire Tuning - Agent

13th Nov 2019 6:01am

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

You're wrong, I'm afraid. As long as they point forward and are centred around the centreline of the vehicle then they're fine. There are detail rules around vertical positioning but they're for much bigger or oddly shaped vehicles and not relevant to a Defender.

What they must be to be legal is wired to go on and off with the main beam. Independently switched aux. lights are not allowed. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

13th Nov 2019 7:54am

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