Brake Light Failure Sensor Test
1. First make sure the brake lights come on when the
brake pedal is pressed.
• If all the brake lights come on, go to step 2.
• If one of the brake lights does not come on, check
whether the bulb is blown. If the bulb is OK, go
to step 2.
• If none of the brake lights come on, check the
brake light circuit.
2. Open the trunk lid, and remove the trim panel that
covers the right taillight. Watch the
light in the safety indicator when the A (WHT/GRN)
wire of the 6-P connector is grounded and the igni-
tion switch is turned from OFF to ON (II).
RIGHT FAILURE SENSOR
6-P CONNECTOR
View from wire side
If the light comes on and stays
on, check for an open in the A (WHT/GRN) wire
between the safety indicator and the right failure
sensor.
If the light does not stay on, go
to step 3.
3. Watch the light as you turn the igni-
tion switch from OFF to ON (II), with the B (GRN)
wire of the 6-P connector grounded and the brake
pedal pressed.
If the light comes on and stays
on, replace the right failure sensor.
If the light does not stay on , go
to step 4.
4. Remove the rear trim panel that covers the left tail-
light. Watch the light as you turn the
ignition switch from OFF to ON (II), with the A (GRN)
wire of the 6-P connector grounded and the brake
pedal pressed.
LEFT FAILURE SENSOR
6-P CONNECTOR
View from wire side
If the light comes on and stays
on, there is an open in the A (GRN) wire between
the left failure sensor and the right failure sensor.
If the light does not stay on, go
to step 5.
5. Watch the light as you turn the igni-
tion switch from OFF to ON (II), with the B (BLK) wire
of the 6-P connector grounded and the brake pedal
pressed.
• If the light comes on and stays
on, replace the left failure sensor.
• If the light does not stay on, check
for an open in the B (BLK) wire between the left
failure sensor and ground, and check for a poor
ground at G551.
1. First make sure the brake lights come on when the
brake pedal is pressed.
• If all the brake lights come on, go to step 2.
• If one of the brake lights does not come on, check
whether the bulb is blown. If the bulb is OK, go
to step 2.
• If none of the brake lights come on, check the
brake light circuit.
2. Open the trunk lid, and remove the trim panel that
covers the right taillight. Watch the
light in the safety indicator when the A (WHT/GRN)
wire of the 6-P connector is grounded and the igni-
tion switch is turned from OFF to ON (II).
RIGHT FAILURE SENSOR
6-P CONNECTOR
View from wire side
If the light comes on and stays
on, check for an open in the A (WHT/GRN) wire
between the safety indicator and the right failure
sensor.
If the light does not stay on, go
to step 3.
3. Watch the light as you turn the igni-
tion switch from OFF to ON (II), with the B (GRN)
wire of the 6-P connector grounded and the brake
pedal pressed.
If the light comes on and stays
on, replace the right failure sensor.
If the light does not stay on , go
to step 4.
4. Remove the rear trim panel that covers the left tail-
light. Watch the light as you turn the
ignition switch from OFF to ON (II), with the A (GRN)
wire of the 6-P connector grounded and the brake
pedal pressed.
LEFT FAILURE SENSOR
6-P CONNECTOR
View from wire side
If the light comes on and stays
on, there is an open in the A (GRN) wire between
the left failure sensor and the right failure sensor.
If the light does not stay on, go
to step 5.
5. Watch the light as you turn the igni-
tion switch from OFF to ON (II), with the B (BLK) wire
of the 6-P connector grounded and the brake pedal
pressed.
• If the light comes on and stays
on, replace the left failure sensor.
• If the light does not stay on, check
for an open in the B (BLK) wire between the left
failure sensor and ground, and check for a poor
ground at G551.