91 Maxima doesn't have door lock timer
 

I know door locks have been covered for any that have a door lock timer, but my 91 GXE doesn't.

There is no sound when you press the lock switch, nor when you use the digital touch pad, not even a clicking. There are no fuses blown in the fuse box, but I have no idea if there may be a relay involved that I am not aware of.

The door ajar light is stuck on as well, but after testing all the switches I haven't been able to find the problem.

Anyone have any ideas?