Lucas Style Tail Light Wiring Help

[frozenteedub]

Hoping someone who has installed a Lucas Style light can provide some help with wiring.

The lucas light came with red and black wiring only and is apparently grounded by mounting to the frame. TW200 has the yellow/brake, blue/running, and black. If I do red:yellow black:blue I get the brake light working. If I do red:blue black:yellow I get the tail light working. I cannot, however, get brake light and tail light to work at the same time. Anyone have experience with this or know how to correct the problem? Thanks in advance...

[frozenteedub]

Alright, so apparently moving the bike suddenly made it work...loose connection somewhere maybe...

Red:Yellow
Black:Blue

[Michael Bryce Winnick]

Lucas stands for Loose Unconnected Crimps And Solders. The reason people in England drink warm beer is because they have Lucas refrigerators. MBW

[scotti158]

The reason people in England drink warm beer is because they have Lucas refrigerators.

An oldie but a goodie!

[LuvNot]

I have the same question about a 2-wire brake light I want to use too, but haven't figured out how to make the conversion.

Looking at this post, I think I understand, but would someone confirm that if I wire the bike's black wire to one of the light's bolts it would act as ground?

So it would be:

• Light Red wire -> Bike Yellow wire
• Light Black wire -> Bike Blue wire
• Light Bolt -> Bike Black wire

[rbm]

Does the light use a dual filament bulb?

[Fred]

Correct as to the ground often being through the light’s housing. Ground goes through the mounting hardware and then to bike’s frame either directly or through a jumper wire if taillight mounts only to plastic.