[Christ]

Relax, dude... You'll get it figured out.

Here's what you do:

Remove the B1 wire from the ECU connector B.

Tape the terminal to the + (positive) post of the car's battery, and remove the normal battery + cable.

Be sure the battery is properly grounded to the chassis

Locate the bundle of wires under the hood that the B1 is bundled with.

Check each wire with a test light or multi-meter for voltage at the nearest terminal connector (don't pierce the wires, this brings about it's own problems down the road.)

If you don't get a 12VDC signal from any of the terminals, your problem is between the terminal connector and the ECU connector in the B1 wiring somewhere. Repeat this for anything that you'd like to find a short/open with, unless it's an open ground. If you apply power to an open ground, well, theorize.