1957 3100. 235. Stomp starter. 12v
Truck has just recently been hard to start. Battery at 12.6 +/-
This stomp starter has a small terminal just below the large connector for the battery cable. (I have been told that different configurations exist)
It is my understanding that this small connector/wire (purple btw) is connected to the ignition switch to provide 12v at the coil only during the time when the stomp starter is engaged.
Correct so far?
Then when the starter is inactive, the coil is fed through the firewall mounted resistor and runs at about 9.6v +/-.
Correct?
Disconnecting the purple wire from the starter but leaving the large battery cable attached and checking voltage....
12.6 at the large lug on the starter.
10v +/- at the small terminal on the starter with no wires attached and with the starter engaged.
Shouldn't the voltage at the small terminal be 12.6?
Your wisdom is appreciated.

1957 3100, 235 with 4 speed floor shift