Hi - I have a 94 F150 and would like to add a keyless FOB remote. I have tried jumping the pins in the programming connector without any success. I sit in the truck, fasten my seatbelt, unlock the doors, turn key to ACC (or to RUN), then jump the pins. The doors do not lock/unlock to confirm programming mode. Any idea if I run a voltmeter across those pins what I'll find? My one remote works fine...just trying to add additional remotes. Appreciate any thoughts.....thanks!