Mazda MX-5 NA silhouetteMX-5 NA

LIGHTING SYSTEM — Troubleshooting (continued)

T-64prose procedure
Continued from T-63

Step 4

Check bulbs

  1. 1
    Check the bulbs.
    Photo of the front turn-signal bulb assembly being inspected — bulb removal/check view.
    05U0TX-303
  2. 2
    If a bulb is burned, replace it.
  3. 3
    If the bulbs are OK, go to Step 5.

Step 5

Measure voltage at turn signal switch connector

  1. 1
    Turn the ignition switch ON.
    Voltmeter probing the turn-signal switch connector at terminal-wire (B/Y).
    05U0TX-304
  2. 2
    Measure the voltage at terminal-wire (B/Y) of the turn signal switch connector.

Step 5 voltage check

(B/Y)
Voltage12V
ActionGo to Step 6
(B/Y)
Voltage0V
ActionRepair wiring harness (HAZARD 15A fuse — Turn signal switch)

Step 6

Measure the voltage at the terminal-wires of the turn and hazard warning flasher unit connector.

Step 6 voltage check

(B)
ConditionConstant
Voltage12V
ActionRepair wire harness (Flasher unit — Body ground)
(B)
ConditionConstant
Voltage0V
ActionNext, check wire (G/R)
(G/R)
ConditionTurn signal switch right position
Voltage12V
ActionNext, check wire (G/Y)
(G/R)
ConditionTurn signal switch right position
Voltage0V
ActionRepair wire harness (Turn signal switch — Flasher unit)
(G/Y)
ConditionTurn signal switch left position
Voltage12V
ActionNext, check wire (B/R)
(G/Y)
ConditionTurn signal switch left position
Voltage0V
ActionRepair wire harness (Turn signal switch — Flasher unit)
(B/R)
ConditionConstant
Voltage12V
ActionGo to Step 7
(B/R)
ConditionConstant
Voltage0V
ActionRepair wire harness (HAZARD 15A fuse — Flasher unit)

Step 7

Measure voltage at turn signal light connectors

  1. 1
    Disconnect the turn signal light connectors.
    Voltmeter probing the turn-signal-light connectors. Labels: (RH) ... (G/R) (B) (R/B) and (LH) ... (G/B).
    05U0TX-305
  2. 2
    Measure the voltage at the terminal-wires of the turn signal light connectors as shown.

Step 7 voltage check

Front RH
Wire(G/R)
ConditionTurn signal switch right position
Voltage12V
ActionRepair wire harness (Bulb — Body ground)
Front RH
Wire(G/R)
ConditionTurn signal switch right position
Voltage0V
ActionRepair wire harness (Flasher unit — Bulb)
Rear RH
Wire(G/R)
ConditionTurn signal switch right position
Voltage12V
ActionRepair wire harness (Bulb — Body ground)
Rear RH
Wire(G/R)
ConditionTurn signal switch right position
Voltage0V
ActionRepair wire harness (Flasher unit — Bulb)
Front LH
Wire(G/B)
ConditionTurn signal switch left position
Voltage12V
ActionRepair wire harness (Bulb — Body ground)
Front LH
Wire(G/B)
ConditionTurn signal switch left position
Voltage0V
ActionRepair wire harness (Flasher unit — Bulb)
Rear LH
Wire(G/B)
ConditionTurn signal switch left position
Voltage12V
ActionRepair wire harness (Bulb — Body ground)
Rear LH
Wire(G/B)
ConditionTurn signal switch left position
Voltage0V
ActionRepair wire harness (Flasher unit — Bulb)
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