If the v-glide is operating correctly,you can check the controllers output by connecting a multimeter set to 200v DC across the B+(red probe) and M- (black probe) terminals of the controller and with the accelarator pressed to the floor (with the key switched on and the selector in fwd), the reading should show full battery voltage (+-50v) if not the controller has failed. You will of course need to firstly disconnect the A2 terminal on the motor to prevent the cart from roaring off into the beyond.It is normal practice to disconnect the batteries and discharge the capacitor before removing the A2 cable to prevent any chance of a short circuit. Once you have ensured that A2 cable is not going to touch any metalic parts of the cart, reconnect the batteries and proceed with the test.
You can also at the same time check the input voltage by removing the red 18 gauge wire from the controller terminal #1 and connecting the multimeter set for 200vDC to the B- terminal of the controller (black probe) and the red probe to the terminal end of the disconnected red wire. With the accelarator pressed down the solenoid should click and the voltage reading should be full battery voltage. .