trouble shooting power locks 99 EX
 

Recently bought a 99 Accord EX,four door, a sweet little car, four banger V tech, 5 speed, nice suspension, it really scoots right from the box.
In general I'm very happy with the car,but.... the power locks make me think she has a distant relative named Christine. In short they don't work, the alarm goes off unpredictably the remote works only on the drivers door, the key unlocks driver door only or driver and passenger and driver when used in passenger door. The back doors try to respond(solenoids click)but do not lock or unlock. Is this a problem I can sort through myself or is it a Dealer issue($)?