The wire that connects to the + side of the coil should only be hot with the key in the on or start position as it receives power from the ignition switch. If that wire is hot all the time, you have an issue somewhere back toward the ignition switch. If you have 2 small posts on your solenoid, one is hot with the key in the start position and the other goes to the neutral safety switch. First I'd disconnect the wire from the + terminal on the coil and the connectors from both the small studs on the solenoid. Then I'd connect a wire to the + battery post and touch the other end to one of the solenoid studs to see if the solenoid will crank the starter. Then I'd jumper a wire from battery + to coil + and use my solenoid wire to crank the engine. This should give you spark at the plugs if everything on this portion of the starting circuit is good (this takes the ignition switch, etc. out of the starting circuit). Be sure the trans is in neutral/park,the hand brake is set and the tires blocked (to prevent accidental transmission engagement).
This is only good if you haven't done modifications to the electrical systems as that changes the possible parameters. Also, check for signs (droppings) of rodent damage.
This is only good if you haven't done modifications to the electrical systems as that changes the possible parameters. Also, check for signs (droppings) of rodent damage.