I have a 2002 Chevrolet Silverado LS.4WD non HD with a 5.3L located in Northwest Washington State. 3 weeks ago I went to start truck and it worked fine. Last weekend I went to start it and it would not even crank. Dash lights, radio, headlights all fine. Replaced the battery anyway because it was getting old. Truck still would not even turn over. Took the starter and had it bench tested. It passed and I am also getting power to the solenoid. I checked all my fuses and relays associated with starting or ignition. All were good. I am figuring at this point it is the ignition switch. I have a Haynes Repair Manual so started looking at the wiring schematic. Tore my dash apart to get to the ignition switch in the steering column but before I just replaced the ign switch I ran a few electrical tests. When key turned to the start position it supplies power directly to a 10A crank fuse located in the left hand side bussed electrical center. The test light lights up when the key is in the start position then goes out when in the run position, lock or accessory position. So as far as I can tell the ignition switch closes the circuit and allows power when trying to start. Following the wiring diagram further it goes to a Park/Neutral Position Switch which ultimately leads to the starter relay in the under the hood bussed elec center. I am baffled at this point. Anybody any thoughts?
Monday, January 13th, 2014 AT 1:46 PM