Hot starting issues
1975 Plymouth Valiant Operators Manual
According to the FSM, yes you read the diagram correctly, J2 wires are Ignition 1 which is Run.
The one side should be 16 ga dark blue with a stripe and the switch side has no stripe.
Try scrolling through this thread for those molex-like bullet terminals.
Sources for Chrysler type wire terminals
Its critical the barb's hold ther metal terminal in the connector or the terminals will back out when the two halves are assembled.
Since it starts when cold, it seems less likely to be cross wire issue but maybe a loose or poor connection in the J3 wires Ignition 2 (Start).
Heat issues will be from drawing lots of current. Everything that requires the key to be on or in accessory draws power through the J1 wire (heavy red) going into the key switch.
The Run circuit should not draw a lot of current. But if the terminals are not will connected that can cause heat.
Possible causes of excess current could have been a short or high draw in the alternator field circuit, accidental grounding of the run circuit, aftermarket items added to the run circuit.
In 1971, at least with the standard Valiant cluster, the Gage IVR and warning lights also get power from J2 (run) circuit. The diamond represents a factory splice.
That's run. Accessory is on the other side of the locked position.
1975 Plymouth Valiant Operators Manual
Heat.
According to the FSM, yes you read the diagram correctly, J2 wires are Ignition 1 which is Run.
The one side should be 16 ga dark blue with a stripe and the switch side has no stripe.
Looks like they were throwing darts in that thread, but yea there are some threads about the steering column connectors and terminals.
Try scrolling through this thread for those molex-like bullet terminals.
Sources for Chrysler type wire terminals
Its critical the barb's hold ther metal terminal in the connector or the terminals will back out when the two halves are assembled.
Since it starts when cold, it seems less likely to be cross wire issue but maybe a loose or poor connection in the J3 wires Ignition 2 (Start).
Heat issues will be from drawing lots of current. Everything that requires the key to be on or in accessory draws power through the J1 wire (heavy red) going into the key switch.
The Run circuit should not draw a lot of current. But if the terminals are not will connected that can cause heat.
Possible causes of excess current could have been a short or high draw in the alternator field circuit, accidental grounding of the run circuit, aftermarket items added to the run circuit.
In 1971, at least with the standard Valiant cluster, the Gage IVR and warning lights also get power from J2 (run) circuit. The diamond represents a factory splice.