Toyota Tundra 2005 Service - Repair - Maintenance page 3663

B HOW TO USE THIS MANUAL
[N]
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 TERMINALS 1, 2 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 and holds the warning light on until the ignition SW is turned off.
[O] Service Hints
S6 Stop Light SW
2-1 : Closed with the brake pedal depressed
L4 Light Failure Sensor
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
[P]
Code
C7 34
H17 36
: Relay Blocks
[Q]
Code See Page
1
18
[R] : Junction Block and Wire Harness Connector
Code See Page
IB 20
3C 22
[S]
: Connector Joining Wire Harness and Wire Harness
Code See Page
IE1
42
BV1
50
[T]
: Ground Points
Code See Page
BL
50
BO
50
[U]
: Splice Points
Code See Page
I5
44
6
See Page Code
L4
R6
Relay Blocks (Relay Block Location)
R/B No.1 (Instrument Panel Brace LH)
Junction Block and Wire Harness (Connector Location)
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)
Joining Wire Harness and Wire Harness (Connector Location)
Floor Wire and Instrument Panel Wire (Left Kick Panel)
Luggage Room Wire and Floor Wire (Luggage Room Left)
Ground Points Location
Under the Left Center Pillar
Back Panel Center
Wire Harness with Splice Points
Cowl Wire
2005 TOYOTA TUNDRA (EWD611U)
See Page
36
37
Code See Page
B18
50
Code See Page
R7 37
S6 35
Wire Harness with Splice Points
Luggage Room Wire