wire for interior light switch route?

[mxerchris]

my interior light quit working on my 71 when I open drivers side door but still works with the pass. door. I tried to look and see if its possible to get to the back of the switch in the door jamb and can't figure it out also saw a wire going into the kick panel thru a grommet and pulled it slightly and it was not connected and pulled out, is that the wire for the back of the switch? And doesn't it just go to ground when the switch makes? Thanks for any input.