Aftermarket cateye brake/tail light

[caridimondo]

Hi all,

I've done a lot of research and can't seem to find any DIY installs for aftermarket brake lights. I ordered a cateye brake light for my 1980 GS550E and noticed it only has 2 wires while the stock light has 3. I'm assuming 1 of the 3 is a ground wire, so is it even possible to use the 2-wire light? I'm really confused about wiring with these old bikes so any help is appreciated!!

Tom

[Big Rich]

It should be grounded through the mounts to the fender. One wire is for the running light, the other for the brake light.

[Curly]

Cat eye doesnt make street legal lights, do they?

My guess is it's a plastic case, in which case it's ground and positive, and you can't use it. You need a dual filament setup.