How do you fix a solenoid on a club cart?

Simply draw yourself a map of where the wires are all hooked up. Be sure to disconnect the positive wire off of your battery terminal so you don't get a shocking experience. Then replace with a correct new solenoid and hook the wires back up in the same place they were on the old one. No special step-by-step process is needed. You will want to make sure you unhook the battery, though.