Dash indicated "no Bus"?

Hello,

Typically if there is a fault within the main fuse box under the hood, the "No Bus" code comes up. This usually cuts power to all the primary functions and the engine may or may not run.
This fuse box is close to the battery under the hood and it has all the main fuses and relays.

Here are the typical reason for the No Bus code:
- Junction block fuse # 12 open
- Open fused B(+) circuit
- MIC ground circuit open
- DRB or DRB cable
- CCD bus (+) open to MIC
- CCD bus (-) open to MIC
- CCD bus(+)/(-) circuit shorted to ground

https://www.2carpros.com/articles/how-to-check-wiring
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

I have attached a step by step diagnostics for the No Bus error.

Please let me know of any questions.

Thank you.