Bmw  3 Series 1999-2004
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED/GREEN (+) and RED/BLUE (+)   @ IGNITION SWITCH HARNESS
 STARTER  BLACK/BLUE (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  GREEN (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  PURPLE (+)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  N/A  
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  N/A  
 PARKING LIGHTS ( + )  See NOTE #1  See DIAGRAM
 POWER LOCK  BLUE/RED (TYPE B)  @ GENERAL MODULE, 54-PIN PLUG, PIN 22, See NOTE #2
 POWER UNLOCK  WHITE/BLACK (TYPE B)  @ GENERAL MODULE, 54-PIN PLUG PIN 20, See NOTE #2
 DOOR TRIGGER  RED/BLUE (+)  @ GENERAL MODULE 54-PIN PLUG, PIN 18, See NOTE #2
 DOMELIGHT SUPERVISION  COMES ON WITH UNLOCK  
 TRUNK RELEASE  GRAY/GREEN (+)  @ GENERAL MODULE 54-PIN PLUG, PIN 17, See NOTE #2
 SLIDING POWER DOOR  N/A  
 HORN  PURPL/BLUE (+)  See NOTE #3
 TACH  BLACK (AC)  @ DIAGNSTIC CONNECTOR, PASSENGER SIDE OF ENGINE COMPARTMENT OR AT DATA LINK CONNECTOR UNDER DRIVERS DASH
 WAIT TO START LIGHT  N/A  
 BRAKE  BROWN/WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   DISARMS WITH UNLOCK  
 ANTI-THEFT  BMW'S TRANSPONDER ANTI-THEFT SYSTEM, See NOTE #4  @ IGNITION SWITCH TUMBLER
 EXTRA INFORMATION
 NOTE #1: remove the LIGHT SWITCH Module from the dash and remove the cover, a ribbon cable connects the switch to the module will be exposed. With the switch facing towards you interrupt the 4th wire from the left with a relay See DIAGRAM. NOTE #2: the GENERAL MODULE is a WHITE box located behind the GLOVE BOX. The 54-pin plug is the CENTER PLUG. NOTE #3: the HORN wire is located at the HORN RELAY above the GENERAL MODULE, it is a GREEN RELAY NOTE #4: BMW'S TRANSPONDER ANTI-THEFT SYSTEM, Requires Bypass Module, Part # 791 Bypass and an extra ignition key for REMOTE STARTING Operation. To order go to the SECURITY BYPASS MODULE Page on the website. SPECIAL NOTE #5: For the wiring on the 1999 3-series 2-door use the information on the 1998 vehicle listings.