Nutso WE BD 36
Wonder if anybody else has seen this behavior?
My bicycle (Electra Townie 21) has an old WE BD 36 hub motor in the front. I've had the motor for a few years, it's on its second bicycle, etc. I had a successful ride with it just a couple days ago. However today any time I hook up the battery the motor immediately spins like nuts and the BMS immediately trips out the battery.
The throttle is at 0 and doesn't matter where it's set.
It's either the controller or motor and I have in the past seen controllers break such that they only run full-on.
FWIW The bicycle has been chained on the front porch and hence has seen a bit of rain. There was rain over the last couple days but nothing like the rain a few weeks ago, which didn't affect the bike. The porch is covered and there didn't seem to be much rain getting on the bike anyway.
It does sound like a controller or throttle short. Condensation mabye?
Try it with the throttle disconnected , I had the same problem with a controller I connected up wrong. full power to the motor without the throttle connected.
I have the same thing: Electra w/ BD36 and a CA-SA
Maybe there is a short on your CA wiring?
Bingo! Good thing brushed controllers are cheap, but somehow I think you may be capable of just rebuilding it.
This happened to me on my BD-36 on a foggy morning. 100% humidity. The key switch would not stop motor. I pulled the power cord out to stop it. It never happened again.