Car wiring diagrams: Fiero Subwoofer Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. I do not really know anything about how to wire up a subwoofer or amp . up a schematic, let me know if this is the right way to wire things up?.The story of the Fiero subwoofer system seems to be one of the great mysteries of our time. If you are interested in the schematics of the amp, click here. If you grounded one of the speaker wires, or you didn t disconnect the battery while .P cdaba pontiac fiero wiring diagrams l six cylinder models for reference here is the wiring Fiero Fuel Pump Hot Wire Instructions Next Post Dual Subwoofer Wiring Diagram .