Bulldog Security lists the car. Here is the link: http://www.bulldogsecurity.com/bdnew/vehiclewiringdiagrams.asp
AudioVox also lists it: Here is the link: http://techservices.audiovox.com/Login.aspx Sign-up is free.
DIAMANTE 2004 -
PART COLOR LOCATION
12 VOLT CONSTANT RED (+) IGNITION SWITCH HARNESS
STARTER BLACK / YELLOW (+) or BLACK/ RED (+) IGNITION SWITCH HARNESS
STARTER 2 N/A
IGNITION 1 BLACK/ WHITE (+) IGNITION SWITCH HARNESS
IGNITION 2 N/A
IGNITION 3 N/A
ACCESSORY /HEATER BLOWER 1 BLUE/RED (+) IGNITION SWITCH HARNESS
ACCESSORY /HEATER BLOWER 2 BLUE/WHITE (+) IGNITION SWITCH HARNESS
KEYSENSE N/A
PARKING LIGHTS ( - ) GREEN / WHITE (-) @ HEADLIGHT SWITCH
PARKING LIGHTS ( + ) GREEN / WHITE (+) IN PIN 5 @ 6-PIN BLUE Plug, IN DRIVERS KICK PANEL
POWER LOCK BLUE (TYPE B) @ DRIVERS DOOR MODULE IN DRIVER DOOR
POWER UNLOCK RED / GREEN (TYPE B) (Requires Double Pulse) @ DRIVERS DOOR MODULE IN DRIVER DOOR
DOOR TRIGGER See NOTE *1
DOMELIGHT SUPERVISION GREEN/ ORANGE (-) or GREEN/ YELLOW (-) @ PIN 1 of 6-PIN PLUG, ABOVE FUSES
TRUNK RELEASE RED / YELLOW (-) @ PIN 43 of ETACS ECU, See NOTE *4
SLIDING POWER DOOR N/A
HORN GREEN/ RED to RED / WHITE (-) @ STEERING COLUMN HARNESS
TACH WHITE @ IGNITION TIMING CHECK CONNECTOR See NOTE *2
WAIT TO START LIGHT N/A
BRAKE GREEN (+) @ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM BROWN / GREEN (-) See NOTE *3 IN PIN 32 of ETACS ECU, See NOTE *4
ANTI-THEFT TRANSPONDER ANTI-THEFT SYSTEM, REQUIRES 791 BYPASS MODULE AND EXTRA IGNITION KEY TRANSPONDER @ IGNITION SWITCH TUMBLER
EXTRA INFORMATION
NOTE *1 THE DRIVERS DOOR TRIGGER IS YELLOW(-),PIN 8, 19 PIN PLUG BELOW ETACS ECU. THE DRIVERS REAR DOOR IS LIGHT GREEN(-), PIN 8 IN 22 PIN BLACK PLUG ABOVE FUSES.THE PASSENGERSIDE DOOR TRIGGERS ARE BOTH IN A 14 PIN PLUG AT THE ASSIST ECU IN THE PASSENGER KICK PANEL.THE FRONT PASSENGER DOOR IS WHITE/ GREEN(-) IN PIN 4 AND THE REAR PASSENGER DOOR IS YELLOW/BLACK(-) IN PIN 12. WHEN CONNECTING TO AN ALARM SYSTEM USE ALL 4 DOOR TRIGGER WIRES AND DIODE ISOLATE, TO CONNECT, SEE DIAGRAM NOTE *2 THE IGNITION CHECK CONNECTOR IS A 3 PIN PLUG ABOVE THE BRAKE MASTER CYLINDER.THE WHITE WIRE IS ALSO LOCATED AT THE DISTRIBUTOR. NOTE *3 METER THIS WIRE BY TURNING KEY IN THE TRUNK KEY CYLINDER. NOTE *4 THE ETACS (Electronic Timing/Alarm Control System), ECU (Electronic Control Unit) MODULE IS ATTACHED TO THE BACK OF THE FUSEBOX.
Soldering is fun!