I am installing the wiring harness in the engine compartment ('68) that includes the purple and yellow starter wires. My engine is a chevy 350 with an Ultima 03-0485 starter. This starter is not marked with any "S" or "R". Trying to figure out which wire go where (see photo of starter). I am assuming that the positive battery lead goes on the big terminal at the bottom. The purple wire would then go to the smaller terminal at the upper left. Do I ignore the yellow wire and just tape up the end?
Depends if you have a points distributor or an HEI. Points run on less than 12 volts, 6-9. The wire from the firewall terminal block to the distributor is a resistor wire which reduces the voltage. I seem to remember Chevs having a ballast resistor instead of a resistor wire. Points distributors use 12 volts to start, which is supplied to the distributor via the starter using the yellow wire. HEIs use 12 volts to start and to run, a switched 12 volt wire is used in place of the resistor wire.
