2003 Toyota Tacoma Alarm/Stereo Wiring

Hi langevin, you're welcome and thanks.

I believe it's the same as a 2002, but as always verify each wire with your meter before making any connections. If the colors are different, the polarity and location will like be the same as shown below and should help you locate the correct wires. If you do find any differences, please post your results.

|       ITEM      |     WIRE COLOR     |POL|       WIRE LOCATION        |

|              12V|white & WHITE/ red   |+  |ignition harness            ||          STARTER|black               |+  |ignition harness            ||         IGNITION|BLACK/ red           |+  |ignition harness            ||  SECOND IGNITION|BLACK / YELLOW        |+  |ignition harness            ||        ACCESSORY|blue/red            |+  |ignition harness            ||       POWER LOCK|gray *1             |-  |white plug near fusebox     ||     POWER UNLOCK|purple *1           |-  |white plug near fusebox     ||       LOCK MOTOR|blue/white          |   |DKP, 12 pin plug in pin 10  ||     UNLOCK MOTOR|blue                |   |DKP, 12 pin plug in pin 11  ||    DISARM DEFEAT|blue                |   |PKP, 12 pin plug in pin 9   || PARKING LIGHTS +|green               |   |back of fusebox, 12 pin plug|| PARKING LIGHTS -|PURPLE / red          |   |front of fusebox,22 pin plug||       HEADLIGHTS|*2                  |-  |front of fusebox,22 pin plug||     DOOR TRIGGER|*3                  |-  |front of fusebox,22 pin plug|| DOME SUPERVISION|comes on with unlock|   |                            ||       TACHOMETER|lt. GREEN/ black     |   |instrument cluster or *4    ||      SPEED SENSE|GREEN/ orange        |4  |ECM behind the glove box    ||       BRAKE WIRE|GREEN / WHITE         |+  |brake pedal switch          ||     HORN TRIGGER|GREEN/ red           |-  |steering column             ||           WIPERS|blu/blk(L),RED / wht(H|+  |steering column             ||  LF WINDOW UP/DN|blue - blu/yel      |A  |driver window switch        ||  RF WINDOW UP/DN|RED / blk - RED / grn   |A  |DKP, 12 pin plug            ||  LR WINDOW UP/DN|RED / blu - blu/blk   |A  |DKP, 13 pin plug            ||  RR WINDOW UP/DN|yellow - lt. green  |A  |DKP, 13 pin plug            ||        RADIO 12V|blue / YELLOW         |+  |radio                       ||     RADIO GROUND|brown               |-  |radio                       ||     RADIO SWITCH|gray                |+  |radio                       || RADIO ILLUMINATE|GREEN/ red           |+  |radio                       ||       LF SPEAKER|pink - purple       |   |radio                       ||       RF SPEAKER|lt. green - blue    |   |radio                       ||       LR SPEAKER|black - yellow      |   |radio                       ||       RR SPEAKER|red - white         |   |radio                       |

Notes:

*1 These wires will test only by operating the key in the passenger door lock cylinder, not the rocker switch on the door.  *2 Vehicles without Daytime Running Lights it is RED / blue. Vehicles with DRL it is RED / green.  *3 The driver door trigger is green, the front passenger door trigger is GREEN / WHITE, and the rear door trigger is YELLOW /GREEN. Use all three wires and diode isolate each.  *4 On the 4 cyl it is at the data link connector to the right of the steering column. On the V6 it is at the igniter on the passenger fender, below the air filter box.

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