OK. Continuing to try and figure this out. I did check the 4 pin connection and it looks like new as did all the connections and devices under the cover where the ITC and solenoid are. Here's what I have:
The other day, we were using the cart, everything normal. After stopping to for a minute, then trying to go forward, the cart lunged maybe 12 inches and died. Like a fuse blew or something. No response or sounds when pressing the pedal other than solenoid click.
I checked the "Little Fuse" as it has blown in the past and same symptoms but it seems fine.
I fully charged the batteries (they were close to full to start with). Seemed to charge fine, at least from the reading on the charger.
Batteries in no-load = approx 35 volts
Batteries under load = approx 32 volts
When I went to press the pedal to put this under load, the cart actually tries to move, goes a few inches and then the motor just pulsates.
Step one in the troubleshooting guide says check voltage between Controller B+ and M-. This was about 5 volts. I don't know what it is supposed to be.
The batteries are probably getting to be about four years old again. That's about the time I replaced them before. Does any of this smell like bad batteries?
Thanks in advance for any help.