Mazda RX-8 Workshop Manual page 3294

Is there continuity?
5 Turn the ignition switch to LOCK
position
Disconnect the audio amplifier
connector (8-pin, 16-pin).
Terminal 2M (16-
pin)—Terminal B
For front
tweeter (RH)
Terminal 2G (16-
pin)—Terminal A
Terminal 2E (16-
pin)—Terminal B
For rear
speaker/tweeter
(LH)
Terminal 1C (8-
pin)—Terminal A
(speaker)/terminal
A (tweeter)
Terminal 1D (8-
pin)—Terminal B
(speaker)/terminal
B (tweeter)
For rear
speaker/tweeter
(RH)
Terminal 1E (8-
pin)—Terminal A
(speaker)/terminal
A (tweeter)
Terminal 1F (8-
pin)—Terminal B
(speaker)/terminal
B (tweeter)
For center
speaker
Terminal 1G (8-
pin)—Terminal A
Terminal 1H (8-
pin)—Terminal B
YesRepair or replace the related wiring harnesses
or speaker unit.
NOTE: