Gmc  Full Size Jimmy 1987-1991
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  PURPLE (+) or YELLOW (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  N/A  
 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 or FUSEBOX
 POWER LOCK  LIGHT BLUE (TYPE A)  IN EITHER DOOR HARNESS
 POWER UNLOCK  BLACK/WHITE (TYPE A)  IN EITHER DOOR HARNESS
 DOOR TRIGGER  WHITE (-)  @ UNDERDASH LIGHT
 DOMELIGHT SUPERVISION  USE DOOR TRIGGER, (Requires Part #775 Relay)  
 TRUNK RELEASE  N/A  
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  PURPLE/WHITE, See NOTE #2  @ IGNITION COIL or DISTRIBUTOR
 WAIT TO START LIGHT  DARK BLUE (-), See NOTE #1  @ INSTRUMENT CLUSTER
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   N/A  
 ANTI-THEFT  N/A  
 EXTRA INFORMATION
 NOTE #1: when hooking up a remote starter, if you cannot get the (+) or (-) Wait to Start wire on the Remote Starter to work properly, you will then need to disconnect this wire and Program the Remote Starter for the 5, 10, 15 or 20 Second Wait to Start Timmer in the Installation manual. NOTE #2: the DIESEL TACH wire is a PURPLE/WHITE wire at the ECM, the ECM is located behind the glove box in a Silver box with 2 plugs.