Mazda MX-5 NA silhouetteMX-5 NA

WARNING LAMP AND SENDER UNIT

T-40prose procedure

TROUBLESHOOTING

Brake Warning Lamp

Brake Warning Lamp Troubleshooting

  1. 1
    Step 1 — Check brake fluid level. Check brake fluid level.
    Engine bay photo showing the brake master cylinder and brake fluid reservoir for checking the brake fluid level. Illustrates Step 1.
    05U0TX-289
  2. 2
    Step 2 — Check parking brake switch. 1. Disconnect the parking brake switch connector. 2. Check continuity between the terminal of the switch and a body ground.
    Photo of the parking brake switch with test leads from a multimeter connected to the switch terminal and a body ground for continuity testing. Illustrates Step 2.
    05U0TX-075
  3. 3
    3. If not as specified, adjust or replace the parking brake switch. (Refer to Section P.) 4. If the switch is OK, go to Step 3.
  4. 4
    Step 3 — Check brake fluid level sensor. 1. Check continuity of the sensor.
    Photo of the brake fluid reservoir with multimeter leads connected to the fluid level sensor for continuity testing. Illustrates Step 3.
    05U0TX-290
  5. 5
    2. If not as specified, replace the level sensor. 3. If the sensor is OK, repair the wiring harness.

Step 1 — Brake fluid level action

Below MIN
ActionCheck brake system (Refer to Section P)
Above MIN
ActionGo to Step 2

Step 2 — Parking brake switch continuity

Pulled one notch
ContinuityYes
Released
ContinuityNo

Step 3 — Brake fluid level sensor continuity

Below MIN
ContinuityYes
Above MIN
ContinuityNo
Support our work!

See also

Section P

Search Manual

Search pages, specs, and procedures