This is the original OEM workshop electrical manual for the 2003 Toyota Tacoma wiring diagram, manual reference (EWD517U) in PDF.

in a simple PDF format.

Applicable Models:

VZN150,170,195 Series
RZN140,150,161,
RZN171,191,196 Series
Regular Cab
Double Cab
Double Extra Cab

Engines Covered:

5VZ–FE 2WD M/T, 3RZ–FE AND 2RZ–FE

This manual contains circuit wiring diagrams of each electrical system, wiring route diagrams and harnesses, and an electric diagram showing the location of relays, etc. It is the same manual that your local Toyota dealer is using when repairing your car.

File Format	PDF
File Language	English
You’ll Get	4.7 MB
Page Count	333
Delivery Method	Instant Download

This manual includes the procedures for maintenance, disassembling, reassembling, inspection, and adjustment of components and diagnostics for the guidance of experienced mechanics. Please peruse and utilize this manual to ensure complete repair work to keep your vehicle in optimum condition. Before buying this manual. Please make sure to use Toyota OEM genuine parts. when replacing parts during repair work,

Table of Contents: 2003 Toyota Tacoma Wiring Diagram

Index
Foreword
Introduction
How to Use
Troubleshooting
Abbreviations
Glossary of Terms and Symbols
Relay Locations
Electrical Wiring Routing 1
Electrical Wiring Routing 2
System Circuits
System Circuits
Power Source
Starting and Ignition (5VZ-FE)
Starting (3RZ-FE, 2RZ-FE)
Ignition (3RZ-FE, 2RZ-FE)
Charging
Engine Control (5VZ–FE EXCEPT 2WD M/T)
Engine Control (5VZ–FE 2WD M/T)
Engine Control (3RZ–FE)
Engine Control (2RZ–FE)
Headlight (w/o Daytime Running Light)
Headlight (w/ Daytime Running Light)
Interior Light
Taillight and Illumination
Turn Signal and Hazard Warning
Stop Light
Back-up Light
Light Auto Turn Off
Electronically Controlled Transmission (5VZ–FE)
Electronically Controlled Transmission (3RZ–FE)
Automatic Transmission (2RZ-FE)
Cruise Control (EXCEPT 5VZ–FE 2WD M/T, 3RZ–FE AND 2RZ–FE)
Cruise Control (5VZ–FE 2WD M/T, 3RZ–FE AND 2RZ–FE)
ABS
Horn
SRS
4WD (w/ 2–4 SELECT SW)
4WD (w/o 2–4 SELECT SW)
Rear Differential Lock
Shift Lock
Door Lock Control
Power Window
Remote Control Mirror (w/ Power Window)
Remote Control Mirror (w/o Power Window)
Wiper and Washer (w/ INT TIME SW MECHANISM)
Wiper and Washer (w/o INT TIME SW MECHANISM)
Key Reminder and Seat Belt Warning
Power Outlet
Cigarette Lighter and Clock
Power Seat
Radio and Player
Combination Meter (w/ Tachometer)
Combination Meter (w/o Tachometer)
Air Conditioning
Ground Point
Power Source (Current Flow Chart)
Connector List
Part Number of Connectors
Overall Electrical Wiring Diagram 1
Overall Electrical Wiring Diagram 2

Sample Pages

CAUTION: Please note that this manual is made for the use of persons who have special techniques and certifications. If non-specialized or uncertified technicians perform repairs or services only using this manual or without proper equipment or tools, this may cause severe injury to you or other persons nearby and also cause damage to your vehicle. To prevent dangerous operations and damage to your vehicle, please be sure to follow the instructions thoroughly.