A typical Toyota stereo wiring setup involves two main harnesses: a larger one for power and front speakers, and a smaller one for rear speakers. Power Connections Permanent Power (+12V)
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This connector handles the primary power sources and the front audio channels. Front Right Speaker (+) Pin 2: Front Left Speaker (+) Pin 3: ACC +12V (Switched ignition power) Pin 4: +B / Battery +12V (Constant power for memory) Pin 5: Front Right Speaker (-) Pin 6: Front Left Speaker (-) Pin 7: Ground (Chassis GND) Pin 8: Power Antenna / Amplifier Trigger Pin 9: AMP+ (If applicable) Pin 10: Illumination (+B) 6-Pin Rear Speaker Connector (Connector B) This connector is dedicated to the rear audio output. Pin 1: Rear Right Speaker (+) Pin 2: Rear Left Speaker (+) Pin 3: Rear Right Speaker (-) Pin 6: Rear Left Speaker (-) A typical Toyota stereo wiring setup involves two
Next set of pins to the right (+ on top, - on bottom; often Gray). Standard 6-Pin Connector (Rear Speakers) Pin 1: Rear Right Speaker (+) Pin 2:
Ground (Chassis) — Typically a thick brown or black wire. Secondary 6-Pin Connector (Rear Speakers) Pin 1: Rear Right Speaker (+) Pin 2: Rear Left Speaker (+) Pin 3: Rear Right Speaker (-) Pin 4: NC (Not Connected) Pin 5: NC (Not Connected) Pin 6: Rear Left Speaker (-) 2. Advanced 16-Pin and 28-Pin Connectors
Because these chargers operate on high-voltage three-phase power, the internal wiring is complex. This brings us to the heart of the matter: the diagram.
(Again: exact pins/colors differ by model/year; treat the above as a high-quality exemplar.)