Does it have a standard key as well? Because the lock mechanism doesn't respond to either the inside lock button or keyless remote, I would start by checking the fuse. If it's blown, replace it, but keep in mind there has to be a reason for the fuse to blow in the first place and you'll have to trace the problem to it's root cause or it'll eventually blow again.
If the fuse is good, next check the wiring going to the lock mechanism, looking for damaged wires, loose ground, and/or a loose/dirty connector. If all is good so far, then that only leaves the mechanism itself. Double check it by applying direct battery voltage. If it doesn't work, replace it. If it does, then you missed something in one of the previous steps and you should start your diagnosis over from the beginning.
Friday, June 14th, 2013 AT 1:35 PM