Mazda MX-5 NA silhouetteMX-5 NA

AUDIO — Headrest Speaker Troubleshooting (Steps 8–10)

T-119prose procedure
Continued from T-118

Step 8

  1. 1
    Check if the headrest speaker connector is properly connected.
    Photo of a headrest speaker connector being inspected on a seat headrest. An inset shows a close-up of the connector with terminals visible. Illustrates Step 8 (checking headrest speaker connector).
    05U0TX-262
  2. 2
    If necessary, repair or reconnect the connector.
  3. 3
    If the connection is OK, go to Step 9.

Step 9

  1. 1
    Disconnect the headrest speaker connector.
    Photo of the headrest speaker disconnected with a multimeter probe diagram showing terminals labeled a, b, c, d. Illustrates Step 9 (measuring resistance between terminals).
    05U0TX-263
  2. 2
    Measure resistance between terminals of the headrest speaker connector as shown.
  3. 3
    If not as specified, replace the speaker.
  4. 4
    If the resistance is OK, go to Step 10.

Step 9 — Headrest speaker resistance

a—b
Resistance4 ohm
c—d
Resistance4 ohm

Step 10

  1. 1
    Disconnect the 8-pin connector of the audio unit.
    Photo of the audio unit removed from the dash with its 8-pin connector visible. An inset shows the connector pinout with wire colors R/L, L/W, L/O, R/Y. Illustrates Step 10 (disconnect audio unit connector and check continuity).
  2. 2
    Disconnect both headrest speaker connectors.
    Connector pinout diagram of headrest speaker harness showing four terminals with wire colors L/O, R/Y at top row and L/W, R/L at bottom row.
    05U0TX-264
  3. 3
    Check for continuity of the following wires of the headrest speakers wire harness.
  4. 4
    If not as specified, repair the faulty wiring.
  5. 5
    If the wiring is OK, replace the audio unit.

Step 10 — Headrest speaker wire continuity

Audio unit — Driver seat headrest speakers
Wire(R/Y)
ContinuityYes
Audio unit — Driver seat headrest speakers
Wire(R/L)
ContinuityYes
Audio unit — Driver seat headrest speakers
Wire(L/W)
ContinuityYes
Audio unit — Driver seat headrest speakers
Wire(L/O)
ContinuityYes
Audio unit — Passenger seat headrest speakers
Wire(R/Y)
ContinuityYes
Audio unit — Passenger seat headrest speakers
Wire(R/L)
ContinuityYes
Audio unit — Passenger seat headrest speakers
Wire(L/W)
ContinuityYes
Audio unit — Passenger seat headrest speakers
Wire(L/O)
ContinuityYes
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See also

Step 8 · Step 9 · Step 10

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