Starting and Charging: Locations

Engine Electrical Component Views

Engine Harness Jumper to Engine POA Harness Diesel




1 - Battery - Right
2 - Fuse Holder - Underhood
3 - X127
4 - X108
5 - X107
6 - X123 (PTO)
7 - Fuse Block - Underhood
8 - X109
9 - Battery - Left (6A6/TP2)
10 - Engine Control Module (ECM)
11 - Transmission Control Module (TCM)

Front of Engine Compartment (4.3L)




1 - Battery Current Sensor
2 - Mega Fuse
3 - A/C Low Pressure Switch (C67/CJ2)
4 - Fuse Block - Underhood
5 - Engine Control Module (ECM)
6 - A/C Refrigerant Pressure Sensor (C67/CJ2)
7 - Mass Airflow (MAF)/Intake Air Temperature (IAT) Sensor
8 - Battery - Right

Front of the Engine (Gas - 4.3L)




1 - Throttle Body
2 - Manifold Absolute Pressure (MAP) Sensor
3 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve
4 - Knock Sensor (KS) - 1
5 - Engine Block Heater
6 - Engine Coolant Temperature (ECT) Sensor
7 - Camshaft Position (CMP) Sensor
8 - Generator

Auxiliary Battery Harness (TP2)




1 - Fuse Holder - Underhood
2 - Run Relay
3 - Auxiliary Battery Harness
4 - Auxiliary Battery Relay
5 - X122

Top of Engine Diesel




1 - Turbocharger Vane Position Control Solenoid Valve
2 - Glow Plug Control Module (GPCM)
3 - Fuel Rail Temperature (FRT) Sensor
4 - Intake Air Temperature (IAT) Sensor 2 Connector
5 - X128
6 - A/C Refrigerant Pressure Sensor (C67/CJ2)
7 - Generator - Left (K76)
8 - A/C Compressor Clutch (C67/CJ2)
9 - Engine Coolant Temperature (ECT) Sensor 1
10 - Engine Coolant Temperature (ECT) Sensor 2
11 - Camshaft Position (CMP) Sensor
12 - X127
13 - Generator - Right
14 - Manifold Absolute Pressure (MAP) Sensor
15 - Intake Air Heater (IAH) Module
16 - Intake Air Temperature (IAT) Sensor 2
17 - Fuel Heater
18 - A/C Low Pressure Switch (C67/CJ2)

Left Side of Engine (4.3L)




1 - Generator
2 - Throttle Body
3 - Transmission
4 - Park/Neutral Position (PNP) Switch
5 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
6 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
7 - Knock Sensor (KS) - 1
8 - Engine Coolant Temperature (ECT) Sensor
9 - A/C Compressor Clutch (C67/CJ2)

Right Side of Engine (4.3L)




1 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve
2 - Throttle Body
3 - Mass Air Flow (MAF) / Intake Air Temperature (IAT) Sensor
4 - X112
5 - G103
6 - Crankshaft Position (CKP) Sensor
7 - Knock Sensor (KS) - 2
8 - Starter
9 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
10 - Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
11 - Vehicle Speed Sensor (VSS)

Right Side of the Engine (Gas -4.3L)




1 - Ignition Coil 8
2 - Ignition Coil 6
3 - Ignition Coil 4
4 - Manifold Absolute Pressure (MAP) Sensor
5 - Throttle Body
6 - Ignition Coil 2
7 - Knock Sensor (KS) - 2
8 - Crankshaft Position (CKP) Sensor
9 - Engine Oil Level Switch
10 - Starter
11 - Valve Lifter Oil Manifold (VLOM) Assembly
12 - Engine Oil Pressure Sensor

Right Side of Engine (Diesel)




1 - Fuel Injector 7
2 - Fuel Injector 5
3 - Fuel Injector 3
4 - Exhaust Gas Recirculation (EGR) Valve
5 - Fuel Injector 1
6 - Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
7 - Intake Air Valve
8 - Crankshaft Position (CKP) Sensor
9 - Glow Plug 1
10 - G103
11 - G105
12 - Block Heater
13 - Glow Plug 3
14 - Glow Plug 5
15 - Water In Fuel Sensor
16 - Starter
17 - Glow Plug 7

Right Rear of the Engine Compartment (Gas -4.3L)




1 - Battery - Right
2 - A/C Low Pressure Switch (C67/CJ2)
3 - A/C Compressor Clutch (C67/CJ2)
4 - A/C Refrigerant Pressure Sensor (C67/CJ2)
5 - Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor