Partially? How?Well. Your partially correct.
Power is supplied to the ignition via a power relay.
That compensates for a power drop to the starter motor Solenoid during cranking.
In Fact, without this pwr. Relay high power comsumption can keep fuel injectors from operating among other issues.
First of all, there's no "ignition" for a diesel engine (just as there's no throttle).
What do you mean by "power drop to the starter motor Solenoid during cranking?"
What "pwr. Relay?"
Wow.