With the factory starter the red/lt. blue goes to the "S" and the red/lt. green goes to the "I" on the solenoid. Do these wires stay the same or do I change these or run new wires? It is wired correctly with the big posts. 71 Maverick with battery located in the trunk. Thank you.
The I and S stay the same as before. The heavy main starter wire gets moved over and joins to the batt+ lug of the old solenoid and a 12g wire is used off the old starter lug down to the starter to trigger that new solenoid.
Ok that's how I have it wired, but doesn't want to trigger the starter. I just swapped out the solenoid due to being hot on the 12 gauge side with the key off. New one works as it should after the solenoid change but not working correctly. I checked the red/light green with a test light and lit up with with the key in the on position not just the start position.
The way you had it in your 1st post - red / light blue to S Tom's diagram is spot on for correct wiring.
