YK42-3 problem

[andreweb1]

Second trip out and I reversed the polarity of my battery to my YK42-3 (accidentally).

A visual on the controller shows no exploded components. What typically goes first when you send -36v up the wrong way?
Any help is appreciated.

Andrew

 

[Link]

The capacitors, I think. They're of the electrolytic type (polarized), so they don't take kindly to being put in backwards.

 

[rkosiorek]

capacitors are very robust in comparison to semiconductors. especially the integrated circuits. without any reverse polarity protection i would guess that most of the transistors and semiconductors (if not all except for diodes) would be toast.

rick

 

[fechter]

Reverse polarity will typically take out one or more FETs and possibly the freewheel diodes. These can be measured with an ohmmeter. Measure resistance (diode check best) between the motor neg and battery neg wires. Also measure between the motor neg and battery positive. Measure both ways and look for shorts. Normally, you should see some resistance in one direction, but not a short both ways.

You could also blow the voltage regulator, but it may survive if the other parts shorted first.

Did it blow a fuse somewhere?