Eeek...those are not original wires. I wonder how they look at the board.....
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yeah I think your right, and someone crossed the two grounds when putting the case back together. Thinking I may power this one up with fused power supply
Sleeps with a night light on, not because he's scared of the dark but because the dark is scared of him...........stay thirsty my friends
the esc has an internal regulator, for BEC. This is usually a 3 tab device, sometimes they mount with little gullwing legs, and sometimes they look like a miniFET. one side of the regulator goes to the batt+ lead, one side goes to the receiver red wire, and usually, the switch will break the connection along there somewhere(most likely on the batt+ side, it probably ties into the same pad as one of the big red wires). The third lead is the reference leg, which is almost always GND. so you can follow the three traces around the board to see which one of the black wires ties into that little regulator. the other black wire will connect to the FET's only.
OH, also, even easier. Follow the traces on the black receiver wire, whichever large lead is connected to it will be BATT-. As far as the positive leads since this is a forward/brake only, they 'should' be wired together, so either can be used for either.
I did follow as best as I could and tried it the way I thought made sense and tah-dah!!! works great. My 33 year old eyes dont work as good as my 23 year old eyes or I may have been able to follow a bit bettter
Sleeps with a night light on, not because he's scared of the dark but because the dark is scared of him...........stay thirsty my friends