Mazda MX-5 NA silhouetteMX-5 NA

LIGHTING SYSTEM — Inspection (Canada spec., Headlight relay, Retractor relay)

T-57prose procedureUnverified

Headlight relay inspection is U.S. spec.; headlight switch table shows Canada-spec terminals (HB, BTN).

Continued from T-56

Headlight switch — Canada spec.

Headlight switch (Canada spec.) inspection

  1. 1
    Remove the column cover and disconnect the headlight switch connectors.
  2. 2
    Check for continuity between terminals of the switch.
    Combination headlight switch (Canada spec.) viewed showing terminal callouts BTN, BA, HB, HU, HL, TNS, HO at the connector. Illustrates continuity check between switch terminals.
    05U0TX-113

Headlight switch (Canada spec.) continuity

Headlight
Low beam
HB
HLO
HU
BAO
BTNO
TNS
Headlight
High beam
HBO
HL
HUO
BAO
BTNO
TNS
Passing
HB
HL
HUO
BA
BTNO
TNS
Tail, Parking
HB
HL
HU
BAO
BTNO
TNSO

Headlight relay (U.S. spec.)

Headlight relay (U.S. spec.) inspection

  1. 1
    Check continuity between terminals 3 and 4.
    Ohmmeter connected across terminals 3 and 4 of the headlight relay. Illustrates Step 1 — continuity check between terminals 3 and 4 with no power.
    05U0TX-114
  2. 2
    If not as specified, replace the headlight relay.
  3. 3
    If correct, go to Step 4.
  4. 4
    Apply 12V to terminal 1 and ground terminal 2. Check for continuity between terminals 3 and 4.
    Ohmmeter connected across terminals 3 and 4 of the headlight relay while 12V is applied from a battery to terminals 1 and 2. Illustrates Step 4 — energized continuity check.
    05U0TX-115
  5. 5
    If not as specified, replace the headlight relay.

Headlight relay — Step 1 continuity (de-energized)

3—4
ContinuityNo

Headlight relay — Step 4 continuity (energized)

3—4
ContinuityYes

Headlight retractor relay

Headlight retractor relay inspection

  1. 1
    Check continuity between terminals of the relay.
    Ohmmeter connected to the retractor relay across terminals 1–4, 2–4, and 3–5 in turn. Relay viewed with numbered terminals 1, 2, 3, 4, 5 visible. Illustrates Step 1 — continuity check between specified terminals.
    05U0TX-116
  2. 2
    If not as specified, replace the retractor relay.
  3. 3
    If correct, go to Step 4.
  4. 4
    Apply 12V to terminal 3 and ground terminal 5. Check continuity between terminals of the relay.
    Ohmmeter connected to the retractor relay terminals 1–4 and 2–4 while 12V from a battery is applied to terminal 3 and ground terminal 5. Illustrates Step 4 — energized continuity check.
    05U0TX-117
  5. 5
    If not as specified, replace the retractor relay.

Retractor relay — Step 1 continuity (de-energized)

1—4
ContinuityYes
2—4
ContinuityNo
3—5
ContinuityYes

Retractor relay — Step 4 continuity (energized)

1—4
ContinuityNo
2—4
ContinuityYes
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