TaylorMcG

I have a '93 C1500 Silverado. I bought it knowing it needed work, it is an old truck and has 259,000 miles on it. I am a beginner mechanic and have been able to fix everything I have felt needed so far.
One thing I haven't gotten fixed yet is the brakes. There is a blow out in the rear lines, which isn't a huge problem considering the fronts shoulder most of the stopping. All the same, it has been rainy here in Indiana the past week and I don't like driving the truck in the rain if I don't have to because the stopping isn't so great with no rear brakes.

Two days ago the truck started acting in a way I've never seen or had to deal with in any vehicle before.

I went outside in the morning to head to work in the truck. I put the key in the ignition, and turned the power on, all lights, radio, everything that comes on came on when you turn the power on. I turned the key to start the truck, and the power and everything shut off. I figured it was just something due to me having an old truck and having rainy, cold weather, maybe it just drained a bit. I ended up taking my car, and when I got home from work that evening, I tried starting the truck again, power came on, but when I tried starting it, nothing. The power once again shut off and then it was like the truck had absolutely no power at all.

Today, I thought maybe the weather drained my battery since it has been so cold, so I pulled my car up to the truck and tried jumping it. Same thing happened as before.
Like I said, I have never come across a vehicle acting like this and have no clue what it could be.

Within the starting system, I have replaced the battery (Optima Red Top), the alternator, and the starter.
Any advice at all would be more than welcomed.

89scottsdale

Replace your ignition switch. dirt cheap. and even if that isnt the problem, (im betting that it is) check fuses and check the starter solenoid.