2012 TOYOTA TUNDRA lights

580 4-3. Do-it-yourself maintenance
Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1 A/F 15 A Multiport fuel injection system/
sequential multiport fuel injection
system
2 HORN 10 A Horn
3 EFI NO.1 25 A Multiport fuel injection system/
sequential multiport fuel injection
system
4 IG2 MAIN 30 A INJ, MET, IGN fuses
5 DEICER 20 A Front windshield wiper de-icer
6 TOW TAIL 30 A Trailer lights (tail lights)
7 POWER NO.4 25 A Power windows
8 POWER NO.2 30 A Power back windows
9 FOG 15 A Front fog lights

581
4-3. Do-it-yourself maintenance
4
Maintenance and care
10 STOP
15 AStop lights, high mounted stop-
light, vehicle stability control sys-
tem, anti-lock brake system, shift
lock system, multiport fuel injection
system/sequential multiport fuel
injection system, towing converter
11 TOW BRK 30 A Trailer brake controller
12 IMB 7.5 AMultiport fuel injection system/
sequential multiport fuel injection
system
13 AM2 7.5 A Starting system
14 TOWING 30 A Towing converter
15 AI PMP HTR 10 A Air injection system
16 ALT-S 5 A Charging system
17 TURN-HAZ 15 A Turn signal lights, emergency
flashers, towing converter
18 F/PMP 25 A Fuel system
19 ETCS 10 AMultiport fuel injection system/
sequential multiport fuel injection
system, electric throttle control sys-
tem
20 MET-B 5 A Gauges and meters
21 AMP 30 AAudio system, rear view monitor,
navigation system, rear seat enter-
tainment system
22 RAD NO.1 15 A Audio system, rear view monitor,
navigation system, rear seat enter-
tainment system
FuseAmpereCircuit

582 4-3. Do-it-yourself maintenance
23 ECU-B17.5 AMultiplex communication system,
Multiport fuel injection system/
sequential multiport fuel injection
system, auto anti-glare inside rear
view mirror, power outlets, power
front driver’s seat, power tilt and
power telescopic
24 DOME 7.5 AInterior lights, personal lights, van-
ity lights, engine switch light, foot
light, accessory meter
25 HEAD LH 15 ALeft-hand headlight
(high beam)
26 HEAD LL 15 ALeft-hand headlight
(low beam)
27 INJ 10 AMultiport fuel injection system/
sequential multiport fuel injection
system, ignition system
28 MET 7.5 A Gauges and meters
29 IGN 10 ASRS airbag system, multiport fuel
injection system/sequential multi-
port fuel injection system, cruise
control system
30 HEAD RH 15 ARight-hand headlight
(high beam)
31 HEAD RL 15 ARight-hand headlight
(low beam)
32 EFI NO.2 10 AMultiport fuel injection system/
sequential multiport fuel injection
system, leak detection pump
33 DEF I/UP 5 A No circuit
34 SPARE 5 A Spare fuse
35 SPARE 15 A Spare fuse
36 SPARE 30 A Spare fuse
FuseAmpereCircuit

585
4-3. Do-it-yourself maintenance
4
Maintenance and care
14 ECU-IG No.1 7.5 A
Anti-lock brake system, vehicle sta-
bility control system, multiplex com-
munication system, intuitive
parking assist system, power front
driver’s seat, power tilt and power
telescopic, shift lock, tire pressure
warning system, accessory meter,
trailer towing, power outlet, electric
moon roof
15 LH-IG 7.5 A Back-up lights, charging system,
gauges and meters, turn signal
lights, air conditioning system, seat
heaters, back window defogger
16 4WD 20 A Four-wheel drive control system
17 WSH 20 A Window washer
18 WIPER 30 A Wiper and washer
19 ECU-IG No.2 7.5 A Multiplex communication system,
power steering
20 TAIL 15 A Tail lights, trailer lights (tail lights),
parking lights, outer foot lights
21 A/C IG 10 A Air conditioning system
22 TOW BK/UP 7.5 A Trailer lights
23 SEAT-HTR 20 A Seat heaters or heater and venti-
lated seats
24 PANEL 7.5 A Instrument panel lights, glove box
light, accessory meter, audio sys-
tem, rear view monitor, navigation
system, rear seat entertainment
system, gauges and meters, air
conditioning system
FuseAmpereCircuit

586 4-3. Do-it-yourself maintenance
25 ACC7.5 AAccessory meter, audio system,
rear seat entertainment system,
rear view monitor, navigation sys-
tem, back-up lights, trailer lights
(back-up lights), multiplex commu-
nication system, power outlet, out-
side rear view mirror
26 BK/UP LP 10 A Back-up light, gauges and meters
27 POWER No.1 30 A Power windows, power back win-
dow
■ After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb
may need replacement. ( P. 588)
● If the replaced fuse blows again, have the vehicle inspected by your
Toyota dealer.
■ If there is an overload in the circuits
The fuses are designed to blow, protecting the wiring harness from damage.
CAUTION
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failing to do so may cause damage, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than indicated, or use any
other object in place of a fuse.
● Always use a genuine Toyota fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
This can cause extensive damage or even fire.
● Do not modify the fuse or the fuse box.
FuseAmpereCircuit

588
4-3. Do-it-yourself maintenance
Light bulbs
You may replace the following bulbs yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb
replacement seems difficult to perfor m, contact your Toyota dealer.
For more information about replacing other light bulbs, contact your
Toyota dealer.
■ Prepare a replacement light bulb.
Check the wattage of the light bulb being replaced. ( P. 680)
■ Front bulb locations
Headlight low
beam
Front side marker
lights
Headlight
high beam Front fog lights
(if equipped)
Front turn signal/parking
lights/daytime running
lights (if equipped)

589
4-3. Do-it-yourself maintenance
4
Maintenance and care
Replacing light bulbs
■ Headlight high beam
Unplug the connector while
depressing the lock release.
■Rear bulb locations
High mounted stoplight
and cargo lamps
License plate lights
Back-up lights
Rear turn
signal lights Stop/tail and rear
side marker lights

591
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
Front turn signal/parking lig hts/daytime running lights (if
equipped)
Turn the bulb base counterclock-
wise.
Remove the light bulb.