Query for the electricery experts

**Brick** · 23rd September 2012, 10:36 PM

Have removed my factory driving lights from my D4 as I may as well as had candles sitting on the bumper. Have bought an LED light bar and made a bracket so it mounts using the factory points in the bumper.

The wiring harness supplied is set up for the light to be wired as an accessory light rather than driving lights. The supplier advertises that they do not supply wiring instructions as they should be installed by an auto electrician. Having installed my own DBS and driving lights on my D3 previously, I would rather do it myself.

So finally to the question. I would like to remove the switch that is in the wiring supplied, and connect to the wires from the factory harness that were the leads for the driving lights. The new harness has fuses and relay, but was thinking that by wiring this way, I get the benefit of only coming on when high beam is on, and utilises factory switch already mounted on the console.

If I do connect to the OEM wiring harness, is this likely to cause any issues?

**Redback** · 24th September 2012, 08:56 AM

That switch is there so the driving lights can be turned off and be able to have high beam without the driving lights on, it's an ADR requirement.

A light is a light, the ECU won't know the differance if you wire it up as per factory lights.

Baz.

**Mick_Marsh** · 24th September 2012, 11:41 AM

A light is a light except when it is a LED.
Are there smarts in the computer that may detect it as a blown globe?

**Brick** · 24th September 2012, 09:42 PM

Originally Posted by Redback

That switch is there so the driving lights can be turned off and be able to have high beam without the driving lights on, it's an ADR requirement.

A light is a light, the ECU won't know the differance if you wire it up as per factory lights.

Baz.

Baz,

Sorry not very clear, already have the factory driving light switch mounted which I am hoping I can still utilise by using the existing light leads as the trigger for the new harness.

Thanks

**Canaussie** · 25th September 2012, 06:24 AM

Hey Brick,

What led bar did you end up purchasing?
Are you mounting to the plastic bodywork or bull bar?

Cheers billy

**Brick** · 27th September 2012, 12:40 AM

Billy,

Purchased a Monster Lights Black 32" bar. A bit pricey but it fits nicely between the headlights without sitting up too high and disturbing the airflow to the radiator. Also throws a nice broad white light.

Already had the factory spotty mounts that poke up through the bumper so bought some flat bar to mount the light to. Is nice and solid with no vibration. Hooked up the light using the factory harness to trigger the relay in the new harness. Works a treat. Means only comes on when on high beam and can switch off with OEM spotty switch. My Plod will not be able to complain......other than I only have one light rather than two as mandated by our ancient design rules.

**sniegy** · 27th September 2012, 08:46 PM

Hey Brick any chance of a Photo?

Would like to see what it looks like as I was thinking this also.

Cheers

Sent from my iPad using Forum Runner

**Brick** · 27th September 2012, 11:20 PM

Hi Pete,

As requested. To quote SWMBO, its too bright, sets trees on the side of the road on fire, and has cars 2kms away flashing their lights. Perfect for the open roads in Australia.

BTW, had the D4 in to get the trailer plug checked by the dealer as the fridge was not running on 12v when hooked up to the car. They wanted to undo the EBC wiring which was installed following your instructions. Told them in no uncertain terms not to touch it. Thank god they listened.

**sniegy** · 28th September 2012, 10:09 AM

Love it

Thanks heaps.
Appreciate it.

**CaverD3** · 28th September 2012, 01:37 PM

Should comply:

Mounted in pairs, twelve of them.

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