You don't. You're measuring something wrong.
If the ignition is on, yes.
No.
You're still all over the place with your testing. You've had a bunch of specific questions asked that you aren't answering, and keep just checking random unrelated things.
Alternator, pur/yel piggy backed the oil pressure switch for fuel pump. Actually unsure of coil (+) connection for cranking, would need wiring diagram for specific on that. I guessed on the carb setup based on provided info, t-bolt n all
Check out the diagram I posted. Pur/yel is energized off the starter during cranking and powers the fuel pump. When the op switch closes it back feeds the pump through the p/y wire. Tbolts don't have the resistance wires so always 12v from purple to the coil.
So your wiring is buggered. Your oil pressure switch is bypassed. Dangerous.
Google can tell you in detail, but basically you test for voltage between 2 points on the same wire/circuit. Put 1 end of your meter on either end of a wire for example, with a current flowing through the circuit. There should be minimal if any voltage measured. If there is that means there's excess resistance between the 2 points. It becomes more pronounced the more current is flowing. So if you measured resistance between the 2 ends with no current flow it might be minimal, but a voltage drop under load would tell you that the connection is still bad
Not anymore. @kenny nunez is though.
Agreed. For some reason I do recall some setups used a pur/yel off the alternator. Carbed setups are becoming rare in my world and I may be mistaken. Most focus these days is on mpi/ec engines
