OK - back to the beginning - you have power (12vdc) on the red wire at the key switch?
With all the wiring connected as it was from the factory, unplug the wiring from the key switch - jump the contacts on the wiring harness plug
First red to wht/red - this should cause the solenoid to close and the engine crank and verify the battery and power wiring is good and the engine may start. If you want to prevent the engine from starting, remove the spark plug wire or jump between the brn and blk wires of the key switch connector.
Second jump red to red/wht - this should give you lights - if the lights come on this verifies the chassis power wiring is in good condition. Try switching the lights OFF, ON LO and HI to verify the function of the light switch - if no lights, unplug the LH switch connector with the red/wht, yel and grn wires - with the red jumpered to red/wht at the key switch connector try jumping red/wht to grn for LO beam and red/wht to yel for HI beam on the headlights. If the lights work, then the problem is the wiring connectors or the LH switch assembly. If the lights don't work, then check the lights to assure they are not burned out and have a good ground.
Let me know the results