Hello, newbie here. The last few weeks I've been working on converting my first fat bike with a BBSHD. I installed the BBSHD and plugged in the battery for the first time a week or two ago and both the throttle and the PAS worked fine. I didn't have my brakes set up though, so I didn't take it out for a real ride.
In the meantime, I started waterproofing various components mostly following this guide
. I applied silicon sealent to the BBSHD gasket and liquid tape to various parts of the display and throttle. While I was waiting for those to dry, my new tires arrived and being excited about them, I wanted to do a quick test ride on my driveway after installing them. Nothing on the BBSHD was plugged in, so I simply tucked the cables into my battery bag a rolled around a few feet. Being the idiot I am though, I must've missed the gear sensor cable and I realized that it had wrapped around the crank. Here's some pictures of the damage:
It's hard to see, but there is a tiny cut on the casing, but not much in the way of exposed wires. The cable was twisted pretty good though.
Well, after things dried, I put everything back together and plugged in the battery. I'm not using a gear sensor or speedometer (yet), so I just ziptied those cables them out of the way. The display turns on and shows the battery is fully charged, but when I engage the throttle or turn the pedals to engage the PAS, nothing happens. I did the following to try and troubleshoot:
- Checked all the connections. I had applied dialectric grease, but nothing looks wrong.
- Unplugged my ebrake.
- Tried a spare throttle. I would expect the PAS to work even if the throttle was broken, but worth a shot.
- Plugged in an ebrake sensor to the gear sensor and held the magnet up against the ebrake sensor. Didn't expect this to work either, but again, worth a shot.
So, I don't know how the gear sensor cable works, but my thought is that when the gear sensor cable twisted/ripped, the internal wires connected and are telling the motor to shut off. To someone with more knowledge, does that make sense? I figure a fix could be for me to cut the gear sensor cable below the twisted and fix the internal wires with silicon sealent or epoxy or something to keep them separated. Before I do something like that though, I wanted to explain my situation here. Any thoughts?
Thanks in advance.