Toyota Tundra 2003 Fuse Box Info
Passenger compartment fuse box location:
The fuse box is located under the instrument panel behind the cover on the driver’s side.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° and Name | Rating | Functions |
| 24. WIP | 20A | Windshield wipers and washer |
| 25. TURN | 5A | Turn signal lights |
| 26. ECU IG | 5A | Anti−lock brake system and cruise control system |
| 27. 4WD | 20A | Four−wheel drive control system, A.D.D. control system |
| 28. ACC | 15A | Cigarette lighter, audio system, SRS airbag system, power rear view mirrors, “PWR OUTLET 1” and “PWR OUTLET 2” fuses |
| 29. GAUGE | 10A | Gauges and meters, back−up lights, starting system, air conditioning system |
| 30. IGN | 5A | SRS airbag system, multiport fuel injection system/sequential multiport fuel injection system, discharge warning light, ignition system |
| 31. CARGO LP | 5A | Cargo lamp |
| 32. TAIL | 15A | Tail lights, license plate lights, instrument panel lights, parking lights, glove box light |
| 33. OBD | 7.5A | On−board diagnosis system |
| 34. HORN | 10A | Horns |
| 35. STA | 5A | Multiport fuel injection system/sequential multiport fuel injection system, gauges and meters |
| 36. STOP | 15A | Stoplights, high mounted stoplight |
| 43. POWER | 30A | Power door lock system, power windows, power seat |
Engine compartment fuse box (2UZ−FE engine):
| Fuse/Relay N° and Name | Rating | Functions |
| 1. MIR HTR | 15A | Outside rear view mirror heaters |
| 2. FOG | 15A | Front fog lights |
| 3. TOW BRK | 30A | Trailer brake controller |
| 4. SUB BATT | 30A | Trailer sub battery |
| 5. TOW TAIL | 30A | Trailer lights (tail lights) |
| 6. PWR OUTLET 1 | 15A | Power outlet |
| 7. ECU−B | 5A | Anti−lock brake system |
| 8. H−LP RH | 10A | Right−hand headlight (high beam) |
| 9. PWR OUTLET 2 | 15A | Power outlet |
| 10. DOME | 10A | Interior light, personal lights, vanity light, ignition switch light, step light, door courtesy lights, open door warning light |
| 11. H−LP LH | 10A | Left−hand headlight (high beam) |
| 12. EFI NO.2 | 10A | Multiport fuel injection system/sequential multiport fuel injection system, emission control system |
| 13. RADIO | 20A | Audio system |
| 14. HEAD RL | 10A | Right−hand headlight (low beam) |
| 15. A/C | 10A | Air conditioning system |
| 16. HEAD LL | 10A | Left−hand headlight (low beam) |
| 17. ALT−S | 7.5A | Charging system |
| 18. ETCS | 10A | Multiport fuel injection system/sequential multiport fuel injection system, electronic throttle control system |
| 19. HAZ | 15A | Emergency flashers |
| 20. EFI NO.1 | 20A | Multiport fuel injection system/sequential multiport fuel injection system, fuel pump, “EFI NO.2” fuse |
| 21. AM2 | 30A | Ignition system, starting system, “IGN” and “STA” fuses |
| 22. TOWING | 30A | Towing converter |
| 37. AM1 | 40A | Starting system, “ACC”, “WIP”, “4WD”, “ECU−IG”, “GAUGE” and “TURN” fuses |
| 38. HTR | 50A | Air conditioning system, “A/C” fuse |
| 39. J/B | 50A | “POWER”, “CARGO LP”, “TAIL”, “OBD”, “HORN” and “STOP” fuses |
| 40. ABS 2 | 40A | Anti−lock brake system |
| 41. ABS 3 | 40A | Anti−lock brake system |
| 42. ST3 | 30A | Starting system, “STA” fuse |
|
44. FL ALT 44. FL ALT |
100A (without towing package) 140A (with towing package) |
“AM1”, “HTR”, “J/B”, “MIR HTR”, “FOG”, “TOW BRK”, “SUB BATT”, “TOW TAIL”, “PWR OUTLET 1” and “PWR OUTLET 2” fuses |
Engine compartment fuse box (5VZ−FE engine):
| Fuse/Relay N° and Name | Rating | Functions |
| 1. MIR HTR | 15A | Outside rear view mirror heaters |
| 2. FOG | 15A | Front fog lights |
| 5. TOW TAIL | 30A | Trailer lights (tail lights) |
| 6. PWR OUTLET 1 | 15A | Power outlet |
| 7. ECU−B | 5A | Anti−lock brake system |
| 8. H−LP RH | 10A | Right−hand headlight (high beam) |
| 9. PWR OUTLET 2 | 15A | Power outlet |
| 10. DOME | 10A | Interior light, personal lights, vanity light, ignition switch light, step light, door courtesy lights, open door warning light |
| 11. H−LP LH | 10A | Left−hand headlight (high beam) |
| 12. EFI NO.2 | 10A | Multiport fuel injection system/sequential multiport fuel injection system, emission control system |
| 13. RADIO | 20A | Audio system |
| 14. HEAD RL | 10A | Right−hand headlight (low beam) |
| 15. A/C | 10A | Air conditioning system |
| 16. HEAD LL | 10A | Left−hand headlight (low beam) |
| 17. ALT−S | 7.5A | Charging system |
| 19. HAZ | 15A | Emergency flashers |
| 20. EFI NO.1 | 20A | Multiport fuel injection system/sequential multiport fuel injection system, fuel pump, “EFI NO.2” fuse |
| 21. AM2 | 30A | Ignition system, starting system, “IGN” and “STA” fuses |
| 22. TOWING | 30A | Towing converter |
| 23. ETCS | 15A | Multiport fuel injection system/sequential multiport fuel injection system, electronic throttle control system |
| 37. AM1 | 40A | Starting system, “ACC”, “WIP”, “4WD”, “ECU−IG”, “GAUGE” and “TURN” fuses |
| 38. HTR | 50A | Air conditioning system, “A/C” fuse |
| 39. J/B | 50A | “POWER”, “CARGO LP”, “TAIL”, “OBD”, “HORN” and “STOP” fuses |
| 40. ABS 2 | 40A | Anti−lock brake system |
| 41. ABS 3 | 40A | Anti−lock brake system |
|
44. FL ALT 44. FL ALT |
100A (without towing package) 140A (with towing package) |
“AM1”, “HTR”, “J/B”, “MIR HTR”, “FOG”, “TOW BRK”, “SUB BATT”, “TOW TAIL”, “PWR OUTLET 1” and “PWR OUTLET 2” fuses |
