Power Door Lock Relay 97 LT
 

My front doors won't lock automatically but the back doors do. Also when I manually lock the front doors,all the doors unlock..Since they unlock I assume the actuator is ok. I read there is a powerdoorlock relay butI cannotfind. Does anyone know where that relay is located. Also, for the electronic lock I have read the combination isbehind the back panel. I cannot find it,did all car locks work off the electronic keypad or was that an option? Thanks