Toyota Tundra 2003 Electrical Wiring Diagram page 99

HEADLIGHT (w/ DAYTIME RUNNING LIGHT)
SYSTEM OUTLINE
When the following conditions are met while the ignition SW is ON, and if the light control SW is at OFF or TAIL position, the
daytime running light is controlled.
∗ Parking brake lever is released (Parking brake SW is OFF)
∗ Input signal from the generator
If any of the following conditions are met, the daytime running light control is canceled.
∗ Ignition SW is turned OFF.
∗ Light control SW is at HEAD position.
SERVICE HINTS
H–LP RELAY
5–3 : Closed with light control SW at HEAD position or dimmer SW at FLASH position
Closed with engine running and parking brake lever released
DIMMER RELAY
3–5 : Closed with HEAD relay on and dimmer SW at HIGH or FLASH position
: PARTS LOCATION
Code
30 (2UZ–FE)
B2 B2
32 (5VZ–FE)
C11 A 34
C12 B 34
C15 34
30 (2UZ–FE)
D2 D2
32 (5VZ–FE)
30 (2UZ–FE)
G2 G2
32 (5VZ–FE)
: RELAY BLOCKS
Code See Page
2 21
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page
1B
26 (*1) 26 (*1)
1C
1E 26 (*1)
1J 26 (*1)
1K 26 (*1)
1N
27 (*1) 27 (*1)
1O
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page
40 (2UZ–FE)
EB1 EB1
42 (5VZ–FE)
IA5 44
* 1 : w/ Daytime Running Light
100
See Page Code
H1 H1
H2 H2
J2 J2
J3
J7
J8
Relay Blocks (Relay Block Location)
Engine Room R/B (Engine Compartment Left)
Junction Block and Wire Harness (Connector Location)
Cowl Wire and Driver Side J/B (Lower Finish Panel) Cowl Wire and Driver Side J/B (Lower Finish Panel)
Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
Cowl Wire and Driver Side J/B (Lower Finish Panel)
Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
Cowl Wire and Driver Side J/B (Lower Finish Panel) Cowl Wire and Driver Side J/B (Lower Finish Panel)
Joining Wire Harness and Wire Harness (Connector Location)
Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B) Engine No 2 Wire and Engine Room Main Wire (Under the Engine Room R/B)
Engine Room Main Wire and Cowl Wire (Left Kick Panel)
* 2 : w/o Daytime Running Light
2003 TOYOTA TUNDRA (EWD491U)
See Page
30 (2UZ–FE)
32 (5VZ–FE)
30 (2UZ–FE)
32 (5VZ–FE)
31 (2UZ–FE)
33 (5VZ–FE)
35
35
35
* 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)
Code See Page
J11 35
J13 35
31 (2UZ–FE)
J18 J18
33 (5VZ–FE)
J23 A 35
J24 B 35
P5 35