Stop Light Disconnection Warning - Toyota Camry 1999 Electrical Troubleshooting Manual

SYSTEM OUTLINE
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also
flows through the rear lights warning light to TERMINAL 4 of the light failure sensor.

STOP LIGHT DISCONNECTION WARNING

When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the
current flowing from TERMINAL 7 of the light failure sensor to TERMINAL 2 and 1 changes, so the light failure sensor
detects the disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear
lights warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the
warning circuit on holding and the warning light on until the ignition SW is turned off.
SERVICE HINTS
S6 STOP LIGHT SW
2–1 : Closed with the brake pedal depressed
LIGHT FAILURE SENSOR
L3
1, 2, 7–GROUND : Approx. 12 volts with the stop light SW on
4, 8–GROUND : Approx. 12 volts with the ignition SW at ON position
11–GROUND : Always continuity
: PARTS LOCATION
Code See Page
C8 A 30
C10 C 30
H10 32
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page
1C 20
1D 20
1R 20
1S 20
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page
IF2 40
: GROUND POINTS
Code See Page
BL 44
BP 44
: SPLICE POINTS
Code See Page
B7 44
Code
J4
J40
L3
Junction Block and Wire Harness (Connector Location)
Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
Joining Wire Harness and Wire Harness (Connector Location)
Floor Wire and Instrument Panel Wire (Left Kick Panel)
Ground Points Location
Under the Left Center Pillar
Back Panel Center
Wire Harness with Splice Points
Floor Wire
See Page
31
32
32
Code See Page
B11 44
Code See Page
R9 33
R11 33
S6 31
Wire Harness with Splice Points
Floor Wire