My reserve lights are not working on my 420sel. I replaced the nuetral switch recently and still cannot get the ignition to turn the starter so I have ran a hot wire with a ignition switch to the starter. I removed my shifter to check the linkage it all seems ok., There is a wire that runs into the shifter assembly not sure what it is for, it has power go to it, I am not sure if it is a senor or not ?? Any ideas on what to due or look at ??? Help !!