I just spent 4.5 hours undoing some DIYer attempt at bypassing a switch. Removed 30 ft of unnecessary wires. Made up the missing cables. All it started with was bad on/off switch. He tried putting SAE nuts in place of Metric nuts so he screwed up three solenoids and a very expensive starter/generator on a Club Car golf cart.
What worst is after all my work just to get it to run was to find out the transaxle is screwed up. First thing I noticed in the service mode that the cart move in neutral. Upon further checks found Forward okay, Neutral was Forward, and Reverse locked up. It would require pulling the whole engine and transaxle out the bottom of the cart as it is an unitized setup. Just billed the customer for the parts and time and sent him to another shop that has a crane to lift off the body of the cart.
Meanwhile the customer can go and play with his little balls and push the cart backwards whenever he needs reverse.