The E-Z-GO 36-Volt Solenoid is the gatekeeper of voltage for your golf cart. This relay is the main switch that allows all the voltage at the entire amperage level to pass to your controller or resistor system, depending on the year of the golf cart. For the sake of argument, we are going to assume you have the newer model.There is a whole system of activation switches that work in conjunction to make this solenoid click. You have to turn the key switch to the on position and press the pedal to activate the accelerator microswitch. The golf cart must be in forwarding gear. There is also a reed switch. Basically, a fuse your charger has to be unplugged from for the golf cart solenoid to be able to do its job. If all of these things do not line up, the solenoid will not click. So just because you do not hear it come in does not mean it's bad. Give the experts here at Buggies Unlimited a call to make sure.