"Franc Zabkar" wrote

It probably won't help, but could you post a photo on [a] web space?

Good idea, here it is.

http://religion.p5.org.uk/s/scooter.htm

If the circuit board wants 12 or 24V and hundreds of amps, it has got it
but still refuses to engage the wheels.

I'd still be blaming the batteries. Otherwise, the typical fault in
these types of devices is shorted MOSFETs in the H-bridge(s) that
drive(s) the motor(s). If your scooter has two drive wheels, then I
would expect to find two sets of four MOSFETs on a heatsink. It would
be unusual for both circuits to be faulty, however.

I found 11 transistors on the heatsink. I got the power chair working. Thanks.

One other remote possibility could be that the charging socket is
open, leading the scooter's microprocessor to believe that the scooter
is being charged, in which case it will refuse to move.


- Franc Zabkar