Need a wiring diagram for ignition and starter for 1995 c1500 standard

The key lock cylinder operates the ignition switch sometimes ignition switch is separate sorry I didn't find where ignition switch is located if the lock cylinder is plugged into it.
You should have a starter relay and starter relay fuse.
This diagram of starter circuit shows the clutch pedal switch in the circuit on an automatic should have the neutral safety switch in the circuit. This is for 95 Rodeo.
Stater Motor Circuit Diagram (1995-1997 2.6L Isuzu Rodeo) (easyautodiagnostics.com)

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Starter and solenoid
Isuzu Trooper Starter replace under 1 Hour - YouTube
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Starting System & Wiring Diagram - YouTube

alldatadiy.com

I looked at info for c1500, didn't know engine litre size, may not make any difference.
Two voltage circuits at the starter. One comes from the battery, hot all the time. The other, starter s terminal goes hot with key in the crank position and is wired through the neutral or clutch switch, depending on the tranny. The starter should ground through engine block. Any testing at the starter, make sure tranny is in park or neutral and the parking brake is set.

plastic distributor ? wrong screws in rotor? timing?

It's probably your starter solenoid that is stuck on. Older fords had this solenoid or relay located on the passenger fender apron, but I think on your '95 model, it is located on the starter motor itself.

There are copper contact points or buttons inside the solenoid. Yours must have stuck together. Pretty simple fix: pull the starter off and change the solenoid.

thanks for using FixYa

your battery terminals needs to be change over or you have bad cell in battery.

take the distributor cap off and remove the spark plug from #1 cylinder. put a piece of plastic bag slightly in the #1 cylinder wheny you turn the engine over just bump the starter and listen for the air and the plastic to start blowing out. now look at the position of the rotor that is where #1 cylinder wire goes.(make sure the piston is at the top or check the timing mark on the harmonic balancer it will be on the tdc 0 mark. look at the intake it will have the firing order on it. The ignition rotor turns clock wise that is the order that it fires the next wire on the distributor will go to the next number in the fire order cast
on the intake manifold turning clockwise.

You should be able to get to them through the passenger side wheel well.

if there is any corrosion between your battery cables and terminals you need to clean them real well i have a 1995 chevrolet silverado and i just delt with a similar starting problem there should be 2 cables attached to the positive (+) side pull the 2 cables apart and clean in between them real well the next cheapest thing woul be the starter the ignition switch is exspensive