Blazer 98 PINOUT [PDF]

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Pin 1 2 3 4 5 6 7 8 9 10 10 11 12 13 14 15 16 17 18 18 19 20 20 20 21 22 22 22 23 24 24



C1 (Blue) PCM 32 Pin Connector Wire Color Description --Empty --Empty Brown w/ White 1X Cam (CMP) Sensor Signal stripe --Empty --Empty --Empty Tan HO2S Low Bank 2 Sensor 1 Pink w/ Black Cam (CMP) Sensor Ground (Low) stripe Purple Fuel Gauge (Fuel Level Output) --Empty (1998 Only) Tan w/ Black stripe TCC Control Solenoid (1999 Only) --Empty --Empty --Empty Brown AIR Relay Control (California Only) Yellow w/ Black Vehicle Speed Sensor (VSS) stripe --Empty --Empty Purple w/ White Dual Tank Fuel Module (1998 Only) stripe --Empty (1999 Only) Purple w/ White HO2S High Bank 1 Sensor 1 stripe Purple HO2S High Bank 1 Sensor 2 (1998 Only) HO2S High Bank 2 Sensor 2 w/out C6P -under 8600 GVW Purple (1999 Only) HO2S High Bank 1 Sensor 2 w C6P -over 8600 GVW Purple (1999 Only) Purple HO2S High Bank 2 Sensor 1 Purple w/ White HO2S High Bank 2 Sensor 2 (1998 Only) stripe Purple w/ White HO2S High Bank 2 Sensor 2 w/ C6P -over 8600 GVW stripe (1999 Only) Purple w/ White HO2S High Bank 1 Sensor 2 w C6P -under 8600 GVW stripe (1999 Only) --Empty Tan HO2S Low Bank 1 Sensor 2 (1998 Only) Tan HO2S Low Bank 2 Sensor 2 w/out C6P -under 8600 GVW



24 Tan Tan w/ White stripe Tan w/ White 26 stripe Tan w/ White 26 stripe Tan w/ White 26 stripe 27 --28 Purple Light Green w/ 29 Black Purple w/ White 30 stripe 31 Yellow 32 --25



Pin 1 2



(1999 Only) HO2S Low Bank 1 Sensor 2 w/ C6P -over 8600 GVW (1999 Only) HO2S Low Bank 1 Sensor 1 HO2S Low Bank 2 Sensor 2 (1998 Only) HO2S Low Bank 2 Sensor 2 w/ C6P -over 8600 GVW (1999 Only) HO2S Low Bank 1 Sensor 2 w/out C6P -under 8600 GVW (1999 Only) Empty Crank (CKP) Sensor Ground (Low) Vehicle Speed Sensor (VSS) Low Vehicle Speed Sensor (VSS) Signal 4X Crank (CKP) Sensor Signal Empty.



C2 (Red) PCM 32 Pin Connector Wire Color Description --Empty White Canister Vent Solenoid Control



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--Empty Yellow w/ Black stripe 2-3 Shift Solenoid Control --Empty Light Green 1-2 Shift Solenoid Control Brown PWM TCC Solenoid Control Black Injector #1 Control Dark Blue w/ White stripe Injector #8 Control Brown EGR Pintle Position Light Green w/ Black stripe Injector #2 Control Red w/ Black wire Injector #7 Control Light Green w/ White stripe Idle Air Control (IAC) B High Light Blue w/ White stripe Idle Air Control (IAC) A High Black w/ White stripe Injector #5 Control Yellow w/ Black stripe Injector #6 Control --Empty --Empty Dark Blue Knock Sensor Signal --Empty Light Green Manifold Absolute Pressure (MAP) Signal Tan Intake Air Temp (IAT) Signal Yellow Engine Coolant Temp (ECT) Signal Dark Blue Throttle Position Sensor (TPS) Signal Dark Green Fuel Tank Vacuum Sensor Signal --Empty Yellow w/ Black stripe TFT Signal (Automatic Transmission Only) Yellow Mass Air Flow (MAF) Sensor Signal Light Green w/ Black stripe Idle Air Control (IAC) B Low Light Blue w/ Black stripe Idle Air Control (IAC) A Low Light Blue w/ Black stripe Injector #4 Control Pink w/ Black stripe Injector #3 Control.



Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16



C3 (Grey -Clear-) PCM 32 Pin Connector Wire Color Description Dark Green w/ White A/C Compressor Clutch Relay Control stripe Dark Green w/ White Purge Canister Solenoid stripe --Empty Engine Coolant Temp (ECT) and Throttle Position Black Sensor (TPS) Ground --Empty Red w/ Black stripe PC Solenoid Valve High Dark Blue w/ White Input Speed Sensor Low stripe Red w/ Black stripe Input Speed Sensor High White Ignition Control Module (ICM) Control --Empty Red Transmission Range Signal C Gray 5 Volt Reference Purple w/ White Fuel Level Module (Single Tank) stripe Dark Blue A/C Recirculation Signal --Empty Light Blue w/ White PC Solenoid Low (Automatic Transmission Only) stripe



17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32



Pin 1 2



Black w/ White stripe Black w/ White stripe Black --Orange Dark Blue Pink --Dark Green w/ White stripe --Grey ----Dark Green -----



System Ground System Ground Sensor Ground (IAT/MAP/EGR, etc.) Empty 12 Volt Battery Feed Transmission Range Signal B Transmission Range Signal A Not Used A/C Request Signal Empty EGR, MAP 5 Volt Reference Empty Empty A/C Compressor Cycling Switch Signal Empty Empty.



C4 (Black) PCM 24 Pin Connector Wire Color Description Dark Green w/ White Fuel Pump Relay Control stripe --Empty



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Dark Green w/ White Vehicle Speed Sensor (VSS) Output Signal (TCCM, stripe Radio, Cruise) Vehicle Speed Sensor (VSS) Output Signal Dark Green (Speedometer) Malfunction Indicator Light (MIL) ...Check Engine Brown w/ White stripe Light --Empty Dark Green Inlet Air Actuator (Recirculation Door Motor) Control --Empty Dark Blue Auxiliary Electric Cooling Fan Purple Brake Switch Signal Purple Serial Data (Class 2) Black Dual Fuel Module Return Brown 12 Volt Ignition Feed --Empty --Empty (1998 Only) Tan w/ Black Shift Light (Manual Transmission -1999 Only) Red EGR Valve Solenoid Control --Empty Pink 12 Volt Ignition Feed Black w/ White stripe 4WD Engaged Signal (Wheel Lock Input) White EGR Valve Solenoid Control --Empty --Empty (1998 Only) Brown w/ White stripe CPP Switch Signal (Manual Transmission -1999 Only) Gray w/ Black stripe Transfer Case High Low Switch Light Blue w/ Black Cruise Engaged Signal. stripe