Cart shuts off while driving

[Bigox]

Hello friends, I have a 2001 club car carryall turf2 48 volt cart. I have upgraded everything on this cart except the key switch. Upgrades include new batteries, 2 gauge wires, heavy duty solenoid, reversing contactor, alltrax spm 48500 controller, amd 11hp "beast" motor. Cart has been running great until recently, I will be riding along and it just stops sending power to the motor, let off of pedal and push back down it will start going again. Run time between shut off shortens the longer I drive it. Currently parked until I can resolve issue. I have not noticed any alarms from blinky light on controller, but am concerned it could be a thermal shutdown. Can anyone aid in my troubleshooting or give advise on how to correct issue. Thanks

[scooterman]

Pretty fancy controller, sounds like the controller is dropping out the solenoid for some reason. May be the controller is seeing a low voltage caused by a poor connection somewhere but I'm not familiar with these so will bump your post for help.

[Bigox]

Thanks for the info I will check connections I have a digital volt meter on cart and it's not showing a voltage drop