PRINT
CHEVROLET S-10 BLAZER
MODEL YEAR(S
S-10 BLAZER 2003-2005
KEY T-HARNESS IMMOBILIZER
N/A N/A GM'S PASSLOCK 2 ANTI-THEFT SYSTEM, See NOTE #1
PART COLOR LOCATION DIAGRAM
12 VOLT CONSTANT RED (+) @ IGNITION SWITCH HARNESS
STARTER YELLOW (+) @ IGNITION SWITCH HARNESS
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 ( - ) WHITE (-) @ BCM, LIGHT BLUE plug, See NOTE #2
PARKING LIGHTS ( + ) BROWN (+) @ BCM, LIGHT BLUE plug, See NOTE #2
POWER LOCK LIGHT BLUE (TYPE A) @ BCM, BROWN plug, See NOTE #2
POWER UNLOCK WHITE (TYPE A) @ BCM, BROWN plug, See NOTE #2
LOCK MOTOR WIRE GRAY (5-WIRE) @ RELAY BLOCK, NEXT TO FUSEBLOCK
DOOR TRIGGER See NOTE #3 @ BMC, See NOTE #2
DOMELIGHT SUPERVISION See NOTE #3 @ BCM, See NOTE #2
TRUNK RELEASE BLACK (-) @ BCM, PURPLE Plug
SLIDING POWER DOOR N/A
HORN BLACK (-) @ STEERING COLUMN HARNESS
TACH WHITE (AC) @ PCM, See NOTE #4
WAIT TO START LIGHT N/A
BRAKE WHITE (+) @ STEERING COLUMN HARNESS
FACTORY ALARM DISARM LIGHT GREEN (-) @ BCM, PURPLE plug, See NOTE #2
ANTI-THEFT YELLOW and ORANGE/BLACK PASSLOCK 2 at STEERING COLUMN HARNESS
NOTES
NOTE #1: Vehicle is EQUIPPED WITH GM'S PASSLOCK 2 ANTI-THEFT SYSTEM, REQUIRES 791

BYPASS MODULE to REMOTE START,



to order please go to the SECURITY BYPASS MODULE Page on this website.







NOTE #2: The BCM (Body Control Module) is located to the RIGHT of the GAS PEDAL, below the

RADIO. The PLUGS on the BCM face the DRIVERS side of the vehicle.







NOTE #3: The wires for the DOOR TRIGGERS and DOME LIGHT SUPERVISION are located at the

BCM: The DRIVERS door wire is a TAN(-) B4 and the PASSENGER door is a ORANGE (-)

B2 in the PURPLE Plug. For the REAR doors and REAR hatch use the DARK

BLUE/WHITE B11 in the LIGHT BLUE Plug of the BCM. When connecting an ALARM

SYSTEM use ALL 3 wires and DIODE ISOLATE. For DOME LIGHT SUPERVISION use only

the TAN (-) B4 wire in the PURPLE Plug.







NOTE #4: The PCM (Power Control Module) is located on the PASSENGER FENDER. On the 2.2L

engine the TACH wire is in a BLACK 80-Pin plug, Pin 10 and on the 4.3L engine, the

TACH wire is in a RED 32-Pin plug, Pin 20.
LINK 1 LINK TEXT 1 LINK 2 LINK TEXT 2