Car Alarms: Weak? lock system, conversion van, door locks

Question
I viewed some of your answers - very great service.  Thanks!
Our 2000 Astro conversion van door locks became weak to the point they will not lock/unlock.  Weak means that the front door lock/unlock switches can be heard to try to operate at all door (both front, side and rear), but without enough power to actually lock/unlock any of them.  I checked each door actuator and oiled.  All seemed OK.  I found the relays under the dash.  One relay box has three Omron 7866 12677866 relays.  They make a light click noise each time a switch is ried and become warm if several repeated attempts to lock/unlock.  BTW, the lock activation becomes weaker with successive tries.  There is another box that has two Siemens 3602 12193602 relays.  Can't really tell if they are part of the system or not.  All fuses are OK.  Any ideas?  Replace the relays?  Thanks for any help.

Answer
Thanks!
Yep start with that. Replace with Boshe 30 AMP relays.
Then if no joy, get a junk yard replacement for
the master switch in the drivers door.

From past experience, this might turn out to be
a GM part issue. Ware n tare over 9 years can
make this situation happen.

Let me know what you find.

ALARMTEK