That extra gray and red wire from the controller?

[Slaphappygamer]

I’ve got a 700 series. On the wiring diagram, are all the connectors listed with their function. One is not listed. It is a 2 wire lead with gray and red. After many google searches and countless cups of coffee, I’m unable to identify these. Anti-theft power, learning line, cruise function, I have no clue. It’s hanging in the breeze, to the right. The exact controller model is LSW1155. I couldn’t find much info. Is anyone able to identify this, or have any “testing” I can do? I thought about shorting them, but I need to know more first.

 

[RyanJ]

It's unused. I wouldn't try hooking anything up to it. If you're a skill diy enthusiast, the 1st thing to determine is if there is voltage coming from it and how much. Even then, without knowing if it is programmed to do something else, might be more trouble than it is worth.

 

[Slaphappygamer]

It’s got 48 volts on it, when the bike turns on. Then is dissipates when the bike turns off.

I’m curious, if this was a “speed limiter”, I don’t think it would have voltage. I know some controllers have a jumper placed on the “speed limiter” for sale in other countries where there may be a 25mph limit. If that bike is sold in a country where the “speed limiter” is not needed, then it just gets removed.

True, it can be programmed for another function. You may be right and this may be more trouble than it is worth…….I’m still curious, though.

 

[Slaphappygamer]

Finally got a chance to test this lead. 48 volts is applied when activating the brakes. The 48 volts dissipate and voltage returns to zero.

Right away, I think this is the ebrake, but I already have 2 working sensors for the brake. Could this be a third? What other functions would act like this?

I opened the controller to find the entire cavity filled with silicone. No way I can expose the pcb to read the pads.

 

[RyanJ]

A brake light, if 48V is only there when your activating the brakes. However, it could be something else and cause issues. You could try it out at your own risk.