2006 Chrysler PT Cruiser Q&A

2006 Chrysler PT Cruiser Question: Back up lights not working all fuses are good and bulbs have been changed.

I understand there is a switch or wire that is attached to transmission but the mechanic stated he did not see switch. Need detail on how to get lights working. -
Answer 1
the back up light sensor is incorp. with the trans range sensor on the side of trans -