Do have a 3488764 three speed switch. In the off position on the switch, test the impedance between the B and P terminals. That should read 0 Ohms. The second test is between F1 and the metal frame of the switch. That too should read 0 Ohms. If both of those tests read correctly, then test the...
Some S codes. Maybe the wrong key was hit.
S61 69-71 Tilt/Telescopic Steering Column
S62 69-71 Tilt Steering Column
S74 70-71 Quick Ratio Power Steering
S75 69 Only Quick Ration Manual Steering
S76 69-70 Steering Wheel Horn Ring Full/Fleet
S77 69-71 Power Steering
S78 69-70 Full Horn Ring
S79...
The motor and trans also have a partial number on them. You might find a build sheet somewhere or an old registration. Or a licenses plate form the car.
With that gear ratio, I want to say it was a slant 6 engine or a 318 2 barrel. So what motor mount are there.
The 2.76 gear ratio was typically paired with the TorqueFlite 3-speed automatic transmission (A833) on Dodge Challenger models around 1970-1973. According to factory specifications, the...
Did you use a test light to ground on the front plug? One at a time. Test for power for the brake light. Do left and right turn signals and parking lights. That would tell you which ones are not correct.