You would need a good voltmeter and wiring diagram to trace the wiring and fuses. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online I believe the instrument panel fuse box has a 20 amp fuse #13 (20 Amp) marked cig ltr that protects the circuit.
I just went out and checked. You were right the #13 30 amp waqs blown. I changed it and the door locks jump into action. Thanks a million. PS I found a broken aux power4 adapter on the floor. a stray spring is what trippped the fuse. Youre a great helper, paulrwynn.