93 Honda Accord dead power locks

My Accord's locks stop working more than 2 years ago!! It also has an Avital alarm system (don't know the model number but remotes are gray with 3 purple buttons). The alarm arms and disarms with the remote but the locks don't lock/unlock. The car's lock/unlock switches don't activate the locks either but a faint sound can be heard from the doors. I've tried troubleshooting this rather complicated system with no luck. I do have about 5V going to my switches. My Haynes manual shows that it has a variety of modules relating to the lock system but does not include locations. Looking up under the dash looks scary!!. My local Honda dealer is of no help and wants $75 p/h to fix the problem. Is there someone out there that can walk me through the proper troubleshooting sequence? Do I most likely have a short (all fuses good) or has one control module failed. I'm tired of unlocking my doors with a key and to sometimes trigger the alarm because I couldn't see the led flashing on the dash. Thanks all.

Sounds as if your actuators are bad.  You can purchase aftermarket actuators for around $20 at most install shops.  You will also need relays.Do it right the first time