For a year I have had to turn the key 2 to 6 times to get the starter to engage and start the motor. Recently, after it started, the charge light stayed on all the time, even at highway speed. The belt was tight. The battery has 12.5 volts. I changed out the alternator and battery. Now it won't start at all. and have no headlights, horn, radio or anything. I hear a faint click when I turn the ignition key. I have more problems now than before I changed the alternator. If this is a fuse problem, where would it be?

I have a 95 sonoma with the 4 cylinder engine and its a 5 speed. On my way to work this morning my truck had no power almost as if it was over heating. The temp. gauge was at normal running tempature. I pulled over checked my fluids, and I was fine on coolant, but a little low on oil. When I poped the hood i could smell a slight burning oil smell, well needless to say I added oil. For about 1 minute it seemed to fix the problem, then the loss of power again my oil pressure gauge was moving up and down from low to normal. when the pressure was up I had power and a few seconds later it would go down and I'd lack power dramaticly. It almost felt like i was overheating or had a fouled spark plug. I checked the plugs and wires they are good. (the coil packs, spark plugs and wires I replaced about 4 months ago.) any ideas on what this might be or advice on what to check? Thanx, -Jason