hatch won't lock, back wiper won't work

Has anyone had problems with the 2004 Rainer back hatch not locking? You can lock it with your remote and hear it lock, but it won't lock! You can lift the hatch and the inside lights don't even come on. The dash doesn't even show door open. How would you trace this problem?

there might be a short somewhere...check and see if the 3rd brakelight is working...