MEP 803 10 kw Will not start from S1 on panel

I have 24 volts up to the S1 on 2 and 4 but not on 6 and 8. Suggestions? I was following an old thread, but it ended.

Has this generator ever run in front of your eyes? Or is it new to you?

Have you downloaded the TM's?

Can you read a schematic?

My military MOS was 52 B 20 Generator operator mechanic. That was roughly 48 years ago. Yes, I can read a schematic. Generator is new to me, and it will start and run in battle mode if I hold the magnetic plunger back in the retracted position. I was reading an old post on this non start issue and traced a 24-volt reading as far as the S1 switch. I have 24 volts up to the S1 on 2 and 4 but not on 6 and 8 terminals. Thanks for your response. I recently purchased the technical manual dated 20 October 1983 also identified as TM56115-585-24P. I am unaware of downloadable TM's. I have only started and run the genny for a short period of time as oil pressure gauge does not register and I am assuming that is part of the electrical issue. I plan on installing a direct oil pressure gauge as a secondary confirmation of pressure. Any assistance would be greatly appreciated. Jack.

I will also be printing out the following today,

Also, the fuel pump does activate when the S1 switch is in the prime / run position, just no response when moved to start position.