I have no Back-up lights on my Porsche 928, I have checked the lights, & Relay Both Good, I have clean the Battery connections, This is a summer car only, Just when for an inspection, it failed because of no back up lights, I ordered & replaced the switch on the back of the 5 speed transmission, Still Nothing, Does that Pin have to be in a special place?, does the manual transmission have to be in a certain gear?, Does the car have to be running when turning the top of the back-upswitch, I am just jacking the car up , not on a lift or all four tire off the ground, I have looked ever