Chevrolet  Astro 1998-
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  YELLOW (+)  in SRS Airbag Harness See NOTE**
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  WHITE (+)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  N/A  
 PARKING LIGHTS ( + )  BROWN (+)  @ HEADLIGHT SWITCH
 POWER LOCK  LIGHT BLUE (TYPE A)  IN DRIVERS DOOR HARNESS
 POWER UNLOCK  WHITE (TYPE A)  IN DRIVERS DOOR HARNESS
 DOOR TRIGGER  PURPLE (-)  @ HEADLIGHT SWITCH
 DOMELIGHT SUPERVISION  PURPLE (-), (requires # 775 relay)  @ HEADLIGHT SWITCH
 TRUNK RELEASE  LIGHT GREEN (-)  @ RELEASE RELAY, See NOTE #2
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  WHITE (AC)  @ ECM, See NOTE #3
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   N/A  
 ANTI-THEFT  YELLOW and ORANGE/BLACK  @ IGNITION SWITCH
 EXTRA INFORMATION
 NOTE #1: Equipped with GM's PASSLOCK 2 ANTI-THEFT SYSTEM, Requires Part # 791 BYPASS MODULE. to order go to the SECURITY BYPASS MODULE Page on this website NOTE #2: The Release Relay, is located in the RIGHT REAR QUARTER PANEL. NOTE #3: The ECM (Electronic Control Module) is located under the hood behind the BATTERY. The WHITE tach wire will be in a BLACK plug labled "WHITE" on the ECM.