1996 GMC Sierra automatic door locks

key fob lock/unlock failed when windshield was replaced. (no other work done @ that time). electric locks still work with driver door control.

alternator failed (diode plate and voltage regulator) and while operating vehicle on with damaged electrical system, the auto door locks started working (the ones that lock when vehicle goes into gear, and unlock when in park). When alternator was repaired and reinstalled, auto locks no longer work.

I suspect a relay somewhere, but schematic doesn't show one that would seem to control either/both problems.

help

thanks