Truck, three days ago, was driven and warm. It was shut off at a store. Came out and it wouldn't even turn over. Could hear the solenoid click when key turned on. But no turning the engine over. What could it be? New plugs, plug wires, distributor cap, new distributor, new gear reduction reman starter, new positive battery cable to starter, new coil, new spark plugs, new ignition module. One ~12, or 14, gauge wire from starter to alternator has some internal corrosion showing. The negative black battery ground wire appears somewhat shellacked inside. The battery checks out to have 12 volts, and the lights were bright when they still worked. Truck was running all so fine before it stopped dead.
Tried a new ignition switch in the column today and made things worse as now headlights aren't working nor dome light, radio, dash lights, perhaps more too. The switch was from autozone and there isn't any steering wheel tilt capability. The plunger in the column that goes into part of the ignition switch seems as those it came unhooked inside the plastic column shroud and am wondering how one gets into that area to see where it is supposed to go. Had the ignition cylinder in the locked position. Fuses under the dash are OK. One inline alternator fuse has continuity and am hoping the other one is OK as I couldn't see where it goes in order to check it. This is a friends truck and I'm trying to help him with it and so I don't have any book or manual to work from.
Anyone with good advice will be appreciated, hugely! Been trying for four days to get it going and nothing is better, and now a few things are worse. So much for a mechanics career for me! Help us - please..............!