Welcome to the forum
If you have a Fender mounted starter relay then ALL the wires go on the same post, except for 2.
There will be a smaller Black wire alone on the other larger post(it's other end goes to starter motor, smaller post)
And red/blue stripe wire on the "S" post, smaller post, this wire comes from ignition switch and activates the relay.
In the engine fuse box there will be a 50amp fuse that powers the ignition switch, it is probably blown if there is no power when you turn on the key
Battery will have 2 positive cables, both red
Larger cable runs directly to starter motor
Smaller one runs to starter relay, where all the other wires connect, this is the Power Distribution for the whole truck, it powers the fuse boxes, both of them
No white wire that I can see, there is a Grey wire on that starter relay post, it is from the alternator.
Starter motors are different depending on the years.
1994 starter motor should have a solenoid attached, smaller tube that sits on top of starter motor.
The solenoid pushes the starter motors gear out to make contact with the ring gear on the flywheel.
The solenoid also closes contacts in the starter motor to activate the motor.
The larger Red cable is direct battery power, when solenoid is activated that power is transferred to the starter motor.
The smaller black wire from the Starter relay activates the solenoid.
So when you turn the key to START, 12volts is sent from ignition switch to Clutch switch/Neutral switch then to Starter Relay, starter relay closes and sends power to starter solenoid, starter solenoid pushes starter gear out to engage ring gear and closes contacts to activate starter motor, if all is working engine will start to turn/crank.
If gear is stuck out/engaged the either solenoid or return spring is bad, starter will have to come out to check it
Last edited by RonD; 06-23-2016 at 10:51 PM.