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#1 2018-11-05 22:16:18

Theotetus
Member
Registered: 2018-11-05
Posts: 3

Internal Rear Lights - LEDs

I'm trying to wire up some LED lights in the back of the van.  I've exposed what I think is the correct wires, directly next to the rear door light.  There's 2 green, and 1 red wire.  Does anyone know what wires what, and which ones I need to strip and connect to the LEDs.  I'm guessing the 2 greens...and the red is a door sensor of some sort?

Last edited by Theotetus (2018-11-05 22:21:55)

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#2 2018-11-05 22:32:43

Casper
Member
From: East Lothian
Registered: 2015-12-20
Posts: 1,153

Re: Internal Rear Lights - LEDs

Not got a multi meter to test? Surly ir a simple case of test red, if live as a switch and LED then earth to chassis or however you may have your leisure battery wired.

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#3 2018-11-05 22:42:06

Theotetus
Member
Registered: 2018-11-05
Posts: 3

Re: Internal Rear Lights - LEDs

I'm guessing the wires run straight off the starter battery.  I'm only using the LEDs to provide some extra lighting while I'm getting my tools out...so no leisure battery.  I was running the LEDs of a battery, they have a live and neutral.  Are you saying I only need to wire up a live and earth?

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#4 2018-11-05 23:02:46

Casper
Member
From: East Lothian
Registered: 2015-12-20
Posts: 1,153

Re: Internal Rear Lights - LEDs

Theotetus wrote:

I'm guessing the wires run straight off the starter battery.  I'm only using the LEDs to provide some extra lighting while I'm getting my tools out...so no leisure battery.  I was running the LEDs of a battery, they have a live and neutral.  Are you saying I only need to wire up a live and earth?

Its how mine was wired yes but...... Look round the back door's. Unsure if they had a light switch as that would be better to reduce the chance of leaving the light on but yeah. Mine was direct to the battery and earthed up next to the light.

Now i dont know if all vans are wired like this and i never knew they were but i wanted LED in my cab. They would not work and i could not understand why. It turns out the cab lights what work from the door switch are reverse polarity and can only be wired to work from the door switch or wired from the light switch but not both. Back doors may be like this also.

Have i confused you yet? big_smile big_smile

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#5 2018-11-05 23:18:35

Theotetus
Member
Registered: 2018-11-05
Posts: 3

Re: Internal Rear Lights - LEDs

Yes a bit!
I’m assuming I take the red for live, then try my luck with the
Two greens and see which work. If at all. If not I’m going back to using a small 12v battery and sacking off the internal wiring

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#6 2018-11-05 23:29:56

Casper
Member
From: East Lothian
Registered: 2015-12-20
Posts: 1,153

Re: Internal Rear Lights - LEDs

Theotetus wrote:

Yes a bit!
I’m assuming I take the red for live, then try my luck with the
Two greens and see which work. If at all. If not I’m going back to using a small 12v battery and sacking off the internal wiring

Yes. Im thinking the greens are switched wires for when the doors open. Test with an old bulb if you dont have a meter.

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#7 2018-11-06 01:15:10

kenbw2
Member
From: Bradford
Registered: 2017-11-26
Posts: 171

Re: Internal Rear Lights - LEDs

The live, neutral and earth are AC terms, which might be confusing things. In a car's DC system you only have positive and negative.

The way the door switch works is that there is one positive (+12V) feed, and two negative feeds - one is switched internally by pressing the light unit, and the other is switched by the door.

I only bother with one of them as I've got the door switch working differently, but on the back of my lights I see one positive and two negatives:

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Last edited by kenbw2 (2018-11-06 01:15:35)


1999 Citroen Dispatch 1.9 DW8 Camper Conversion

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