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The "Current Flow Chart" section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
J POWER SOURCE (Current Flow Chart)
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Battery
30A AM2
Starter
Engine Room R/B (See Page 20)
20A
STOP
10A
DOME
POWER SOURCE
E 6
3
EA2
1
EA1
E 7
B
E 7
B–O
B
E 7
B
E 7
∗
The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
2
Fusible Link Block
S 2
100A ALT
Fuse
System
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Multiplex Communication System
Cigarette Lighter and Clock
Combination Meter
Headlight
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off
Theft Deterrent and Door Lock Control
1.25B FL MAIN
W
50A MAIN
B
2
7.5A AM2
2
15A HAZ–RADIO
INJECTION RELAY
1
3
2
2
2
4
2
2
STARTER RELAY
B
1
3
2
2
2
4
2
2
2003 TOYOTA TUNDRA (EWD491U)
Short Pin
15A EFI
10A HAZARD
6
20A RADIO NO.1
10A HORN
6
60A ABS
BATTERY
I 2
7
W
2
I 2
EB1
6
W–R
2
EB1
W
2
W–B
8
4
B–W
W–B
3
2
B–W
10A ECU–B
2
7.5A DOME
2
5
40A DOOR LOCK CB
W
1
1
W
7.5A DOME
1
W
W
I 2
1
W
1
2
1
TAIL
RELAY
4
3
I 8
IGNITION SW
1
1
1
15A TAIL
20A DEFOG
B–Y
1
15A RAD CIG
B–Y
1
B
2
Page
194
187
180
166
210
214
230
112
122
W–L
2
1
R
1
G
G
1
W–R
1
P–L
1
9
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