LED tail light wiring question - Defender Source
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  #1  
Old February 14th, 2015, 03:20 PM
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LED tail light wiring question

All:

I wired the LED brake lights up as follows;

Black to Black
Red to Red
Green to White.

The brake lights come on when I press the pedal if the tail lights are off, but if the tail lights are on, they do not get brighter when I press the brake pedal. This worries me. Is it correct of did I wire something up wrong?

Thanks in advance.

Paul.
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Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #2  
Old February 14th, 2015, 03:37 PM
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Mine were black to white. Can't recall the others. Will be home to check later
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  #3  
Old February 14th, 2015, 03:37 PM
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Which set do you have? Is it a straight up wiring job? Does it need inline resistors that you may be missing?
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  #4  
Old February 14th, 2015, 03:41 PM
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On mine the colours did not match up. You need to test them to see which wires activate which light. There are basically two lights in the housing with a common ground.
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  #5  
Old February 14th, 2015, 03:42 PM
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Trucklite. I found a pic

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  #6  
Old February 14th, 2015, 03:51 PM
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Paul Kennington
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Update:

The lights are WIPAC. I thought they were plug & play but apparently not.

The plot thickens. If I have the lights off & turn then on with the ignition on, the led brake light 'turns on' & then stays on.

Completely flummoxed. Maybe swap the wiring so it's black to black, red to green & white to red?

------ Follow up post added February 14th, 2015 12:54 PM ------

Quote:
Originally Posted by Red90 View Post
On mine the colours did not match up. You need to test them to see which wires activate which light. There are basically two lights in the housing with a common ground.
Is the ground red or black?
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #7  
Old February 14th, 2015, 03:57 PM
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You need to TEST. Take the light off and figure out which terminal does which on its own. Power and ground to find out which is ground, which is brake and which is running.

Then TEST which is which on the truck and hook them up.

Don't guess.

What happens is the light ground through a light circuit when it is off. Most circuit. You most likely have the light ground hooked into the running light power. When the lights are off, the brake light can ground through the "other" running lights in the circuit.
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  #8  
Old February 14th, 2015, 04:09 PM
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Paul Kennington
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All:

I can't test because I don't have anyone to hold the brake pedal whilst I test!

I swapped it so we have Red to Red, Black to White and Green to Black. Now the tail lights work but when I press the brake pedal, the light goes out instead of getting brighter.

Thanks,

Paul.
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #9  
Old February 14th, 2015, 04:09 PM
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Wipec earth is green, source is coloured wire , brake red with orange tracer, indicator green with something

Land Rover earth is black


US trailer earth is white
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  #10  
Old February 14th, 2015, 04:11 PM
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You put a toolbox or whatever heavy against the pedal to turn it on.
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  #11  
Old February 14th, 2015, 05:25 PM
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use a long screwdriver or pry bar on the brake pedal and wedge it against the seat, slide the seat forward. Just get creative and use a circuit tester
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  #12  
Old February 14th, 2015, 05:34 PM
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Paul Kennington
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Quote:
Originally Posted by roverman2010 View Post
Wipec earth is green, source is coloured wire , brake red with orange tracer, indicator green with something

Land Rover earth is black


US trailer earth is white
Except that's not what I have. My WIPAC unit has Black, white & red wires.

And I don't know which is which.
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #13  
Old February 14th, 2015, 05:53 PM
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Quote:
Originally Posted by Paul K View Post
Except that's not what I have. My WIPAC unit has Black, white & red wires.

And I don't know which is which.
Ok, you made me get off my fat arse to check out mine so here goes

white to red black
red to green purple
black earth
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Edward Teach is the Blackbeard, and is a member of the Birmabright Brotherhood.

Still looking for that place where I can carry a paddle and get asked what's that.

JnK Services
FC101 GS FFR
57 LR 88" SXF 858
85 LR90
95 D1 Tdi
05 D3 HSE
97 XK8 BRG FHC For Sale
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  #14  
Old February 14th, 2015, 06:15 PM
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Also make sure your bulb has two filament style to make sure it'll do the 2 functions.
It's not automatic
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  #15  
Old February 14th, 2015, 07:19 PM
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Paul Kennington
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All:

I figured it out...sorta.

Land Rover WIPAC
Green Red
Red White
Black Black

...Works great, except now my brake lights flash with my turn signals.

I can live with that.

Thanks for the help.

Paul.
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #16  
Old February 14th, 2015, 07:41 PM
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That means you have a ground problem in the back. Check where the grounds go.
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  #17  
Old February 14th, 2015, 08:39 PM
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Paul Kennington
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Quote:
Originally Posted by Red90 View Post
That means you have a ground problem in the back. Check where the grounds go.
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #18  
Old February 15th, 2015, 09:53 AM
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Did you wire in the SDL 124 from Roversnorth? If not replace your front ing lights for the old bulb type and your brake lights will stop flashing.
__________________
Edward Teach is the Blackbeard, and is a member of the Birmabright Brotherhood.

Still looking for that place where I can carry a paddle and get asked what's that.

JnK Services
FC101 GS FFR
57 LR 88" SXF 858
85 LR90
95 D1 Tdi
05 D3 HSE
97 XK8 BRG FHC For Sale
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  #19  
Old February 15th, 2015, 11:16 AM
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Paul K
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Paul Kennington
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Quote:
Originally Posted by roverman2010 View Post
Did you wire in the SDL 124 from Roversnorth? If not replace your front ing lights for the old bulb type and your brake lights will stop flashing.
Thanks- will try that today.
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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  #20  
Old February 15th, 2015, 02:09 PM
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Paul K
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Paul Kennington
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Posts: 1,698
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Quote:
Originally Posted by roverman2010 View Post
If not replace your front wing lights for the old bulb type and your brake lights will stop flashing.
Sadly didn't work. Time to buy an SDL 124...
__________________
Current fleet: '85 Ninety 3.9 V8i Auto SW, two Discovery 1's (one for my Nephew, one for my Niece),'07 BMW 335Xi.
Past Land Rovers: '96 Discovery SD, '00 Range Rover HSE, '04 Discovery SE7, '07 Range Rover HSE, '08 LR3 SE7.
Past fleet: '89 Classic Mini, '83 Porsche 911 SC Coupe, '89 911 Carrera targa, '96 911 Carrera 4, '07 Toyota FJ Cruiser, several Minis.
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