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Mike S.
Mike S., Chevy Mechanic
Category: Chevy
Satisfied Customers: 6777
Experience:  ASE Certified Master Technician
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Ok no start command to starter howeve if power is applied to

Customer Question

Ok no start command to starter howeve if power is applied to repay starter turns. Second issue no fuel pump at key on but if power applied a relay pump works. Customer had shut down intermittent gave it to chey replaced intake customer repeated complaint at start no starter no fuel pump acts like security system ingaged? Crank fuses changes from ground to power. Computer was replaced crank sensor replaced.
Submitted: 8 months ago.
Category: Chevy
Expert:  Mike S. replied 8 months ago.

Is there a security message or light on or flashing? If so, can you try a different key?

If not, let me get the wiring diagram and see if this can just be a single fuse blown.

Expert:  Mike S. replied 8 months ago.

Here is the wiring diagram for the starter.

Here is the fuel pump relay,

If the fuel pump fuse 12 is hot all the time, it's most likely the signal that is missing from the pcm. First check all of those fuses.

Expert:  Mike S. replied 8 months ago.

Can you explain what you meant by "Crank fuses changes from ground to power"?

Customer: replied 8 months ago.
Ok if I put a ground on relay ground starter run at key on
Expert:  Mike S. replied 8 months ago.

I have no idea what that means.

Anyhow, did you try a new starter relay and/or a fuel pump relay, also?

Customer: replied 8 months ago.
It's appears that the ground is missing from the start relay and the fuel pump relay and other devices as I turn heater blower and didn't rear a thing
Expert:  Mike S. replied 8 months ago.

Well then, the fuel pump relay ground is G102 and the starter relay ground is not grounded actually. It goes to the PCM.