Mazda RX-7 FD
How do I complete the wiring harness diagram for a Mazda RX-7 FD?
Updated June 2026
To properly tackle a wiring job, you will need the Factory Service Manual (FSM). The FSMs for all years of the RX-7 include the complete factory electrical diagrams and pinouts. You can download these manuals for free at Foxed.ca 4.
If you are working on powering up the ECU or doing custom wiring, the FD ECU pinout requires 12V+ power to pins 1A and 1B, and grounds connected to pins 4A, 4B, 4C, and 4D 9.
This answer was generated by GarageBot's AI from enthusiast forum discussions. Always verify torque specs and safety-critical procedures against the factory service manual before working on your car.
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