Honda Prelude 1993 Service Manual page 1235

1 .
raKe Llgnr rallure Densor I Gsr -
First make sure the brake lights come on when the
brake oedal is gressed.
a lf all the brake lights come on. go to step 2.
a lf one of the brake lights does not come on.
check whether the bulb is blown. lf the bulb is
OK. go to step 2.
a lf none oi the brake lights come on, check the
brake light circuit {see page 23-153).
Open the trunk lid and the taillight access panel to
the right taillight. Remove the bulb socket housing.
Watch the TBRARE-IAMFI light in the safety in-
dicat( , when the B {WHT/GRN) wire of the 4-P con-
nector is grounded and the ignition switch is turned
t r o m O F F t o O N .
a lf the IBRAKE LAMP light comes on and stays
on, check tor an open in the B (WHT/GRN) wire
between the safety indicator and the right
failure sensor.
r tf the i gnnre- LAtt,tp I tight does not sray on. go
to steD 3.
3, watch ttre f aRAKaLAMt light when the ignition
switch is turned from OFF to ON with the D {GRN)
wire of the 4-P connector grounded and the brake
pedal pressed.
o It the [6nAre LAMpllight comes on and stays
on, replace the right failure sensor.
o tt ttre IERAKE LAMpllight does not stay on, go
to step 4.
4 . Open the taillight access panel to the left taillight.
Remove the bulb socket housing. watch the
trTARnAMFl
light when the ignition switch is
turned from OFF to ON with the B (GRN) wire ot the
6-P connector grounded and the brake pedal press-
e o .
a It the BRAKE LAMP I light comes on and stays
on, there is an open in the B (GRNI wire between
the le{t failure sensor and the right failure sen-
sor.
r tt ttre lEnnfELAME light does not stay on, go
to step 5.
Warch rhe trRAK-E LAMFI light when the ignition
switch is turned from OFF to ON with the F (BLK)
wire ot the 6-P connector grounded and the brake
pedal pressed.
r tt ttre I aR-AKaLAMP I light comes on and srays
on, replace the left tailure sensor.
o tt tne IaRAKaLAMPI light does nor slay on,
check for an open in the F {BLK) wire between
the left failure sensor and ground, and check Jor
a p o o r g r o u n d a t G 5 5 1 .
5 .
LEFT FAILURE SENSOR
Brak
Light Failure Sensor Test
23-157