Hello everyone, I need some help. I have a 1949 Jeepster that I inherited from my grandfather and I am in the process replacing the wiring harness. I have a switch under the gas pedal that has wires going to a relay and I have no idea what this switch does. My grandfather upgraded the car to a 12 volt system. If anyone has any ideas please let me know. Also I am lost with how the overdrive works on this thing. Looks like it is a pull out button under the dash. Do you leave it pulled out all the time or what? This car means a lot to me and I don't want to do anything that will ruin it. Thanks for your help.