Name | Location | Locator View | Connector End View |
|---|---|---|---|
Ammeter | In the IP to the right of the gear selector | -- | |
ABS Diode (D201) (ABS-Hydraulic) | In the IP harness, approximately 4 cm (1.6 in) from the MaxiFuse® block/ mini-relay center | Antilock Brake System Component Views in Antilock Brakes | -- |
ABS Indicator Relay (ABS-Air) | In the MaxiFuse® block/ mini-relay center, position C | Air Antilock Brake System Component Views in Antilock Brakes | -- |
ABS Indicator Relay (ABS-Hydraulic) | In the MaxiFuse® block/ mini-relay center, position C | Antilock Brake System Component Views in Antilock Brakes | -- |
ABS Relay (ABS-Air) | In the flasher/ relay center, position 3-B | Air Antilock Brake System Component Views in Antilock Brakes | -- |
Automatic Transmission Fluid (ATF) Temperature Gauge | On the left side of the IP, to the right of the steering column and right of the automatic transmission (AT) selector control | ||
Automatic Transmission Fluid (ATF) Temperature Gauge Sensor | On the lower right rear of the radiator, on the transmission oil cooler inlet fitting | ||
Brake Fluid Level Switch | On the left side of the brake master cylinder reservoir | Hydraulic Brake Component Views in Hydraulic Brakes | Hydraulic Brake Connector End Views in Hydraulic Brakes |
Daytime Running Lights (DRL) Control Module | On the left kick panel, in the DRL harness | Lighting Systems Component Views in Lighting Systems | Lighting Systems Connector End Views in Lighting Systems |
Driver Information Center (DIC) (Cat® Diesel) | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
C1 (11 cavities) | In the IP harness, to the DIC | ||
C2 (11 cavities) | In the IP harness, to the DIC | ||
Driver Information Center (DIC) (Gasoline) | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
C1 (11 cavities) | In the IP harness, to the DIC | ||
C2 (11 cavities) | In the IP harness, to the DIC | ||
Driver Information Center (DIC) (GM Diesel) | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
C1 (11 cavities) | In the IP harness, to the DIC | ||
C2 (11 cavities) | In the IP harness, to the DIC | ||
Electronic Brake Control Module (EBCM) (ABS-Air) | On a bracket, on the left side, upper exterior bulkhead, on the top of the air brake application valve | Air Antilock Brake System Component Views in Air Antilock Brakes | -- |
C1 (30 cavities) | In the electronic brake control harness, to the EBCM | Air Antilock Brake System Component Views in Air Antilock Brakes | Air Antilock Brake System Connector End Views in Air Antilock Brakes |
C2 (18 cavities) | In the electronic brake control harness, to the EBCM | Air Antilock Brake System Component Views in Air Antilock Brakes | Air Antilock Brake System Connector End Views in Air Antilock Brakes |
Electronic Brake Control Module (EBCM) (ABS-Hydraulic) | On the inboard side of the left frame rail, to the rear of number one crossmember, on the bracket | Antilock Brake System Component Views in Air Antilock Brakes | -- |
C1 (2 cavities) | In the electronic brake control harness, to the EBCM | Antilock Brake System Component Views in Air Antilock Brakes | Antilock Brake System Connector End Views in Air Antilock Brakes |
C2 (24 cavities) | In the electronic brake control harness, to the EBCM | Antilock Brake System Component Views in Air Antilock Brakes | Antilock Brake System Connector End Views in Air Antilock Brakes |
Engine Coolant Temperature (ECT) Gauge | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
Engine Coolant Temperature (ECT) Gauge Sensor (Cat® Diesel) | On the right side of the engine, on the right rear side of the coolant outlet housing | ||
Engine Coolant Temperature (ECT) Gauge Sensor (Gasoline) | On the intake manifold water jacket, behind the thermostat housing coolant outlet | ||
Engine Coolant Temperature (ECT) Gauge Sensor (GM Diesel) | On the left side of the left cylinder head, at the front of the cylinder head | ||
Engine Oil Pressure (EOP) Gauge | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
Engine Oil Pressure (EOP) Gauge Sensor (Cat® Diesel) | On the left side of the engine block, on a tee, pointing up | ||
Engine Oil Pressure (EOP) Gauge Sensor and Fuel Pump (FP) Switch (Gasoline) | On the top rear of the engine near the bell housing | ||
Engine Oil Pressure (EOP) Gauge Sensor and Fuel Pump (FP) Switch (Gasoline) | On the top rear of the engine near the bell housing | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Engine Oil Pressure (EOP) Gauge Sensor and Fuel Pump (FP) Switch (GM Diesel) | On the top of the engine, on the center of the engine | ||
Engine Oil Pressure (EOP) Gauge Sensor and Fuel Pump (FP) Switch (GM Diesel) | On the top of the engine, on the center of the engine ) | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Fuel Gauge | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
Fuel Sender and Fuel Pump (FP) (Gasoline) | On the outboard side of the left frame rail, in the fuel tank | ||
Fuel Sender, Left (Cat® Diesel) | On the outboard side of the left frame rail, in the fuel tank | ||
Fuel Sender, Right (Cat® Diesel) | On the outboard side of the right frame rail, in the fuel tank | ||
Generator (Cat® Diesel) | On the right side of the engine | Engine Electrical Component Views in Engine Electrical | -- |
C1 (ring terminal) | In the engine harness, to the generator Bat terminal | Engine Electrical Component Views in Engine Electrical | -- |
C2 (ring terminal) | In the engine harness, to the generator R terminal | Engine Electrical Component Views in Engine Electrical | -- |
C3 (2 cavities) | In the engine harness, to the generator | Engine Electrical Component Views in Engine Electrical | Engine Electrical Connector End Views in Engine Electrical |
Generator (Gasoline) | On the upper right side of the engine | Engine Electrical Component Views in Engine Electrical | -- |
C1 (ring terminal) | In the engine harness, to the generator Bat terminal | Engine Electrical Component Views in Engine Electrical | -- |
C2 (4 cavities) | In the engine harness, to the generator | Engine Electrical Component Views in Engine Electrical | Engine Electrical Connector End Views in Engine Electrical |
Generator (GM Diesel) | On the upper right side of the engine | Engine Electrical Component Views in Engine Electrical | -- |
C1 (ring terminal) | In the engine harness, to the generator Bat terminal | Engine Electrical Component Views in Engine Electrical | -- |
C2 (4 cavities) | In the engine harness, to the generator | Engine Electrical Component Views in Engine Electrical | Engine Electrical Connector End Views in Engine Electrical |
Generator (Charge Indicator) Diode (D200) (Cat® Diesel) | In the IP harness, in the main harness, the in-line diode, approximately 4 cm (1.6 in) to the left of the data link connector (DLC) breakout | -- | -- |
Generator Fuse | Taped to the engine harness at the rear of the generator | -- | |
Glow Plug Relay (GM Diesel) | On the top of the engine, on the left rear side of the engine | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
C1 (ring terminal) | In the vehicle engine harness, to the glow plug relay | Engine Controls Component Views in Engine Controls | -- |
C2 (ring terminal) | In the glow plug harness, to the glow plug relay | Engine Controls Component Views in Engine Controls | -- |
C3 (4 cavities) | In the GM diesel engine harness, to the glow plug relay | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Ignition Switch | On the top side of the lower steering column | Power and Grounding Component Views in Wiring Systems | -- |
C1 (5 cavities) | In the IP harness, to the ignition switch | Power and Grounding Component Views in Wiring Systems | Power and Grounding Connector End Views in Wiring Systems |
C2 (4 cavities) | In the IP harness, to the ignition switch | Power and Grounding Component Views in Wiring Systems | Power and Grounding Connector End Views in Wiring Systems |
Instrument Panel Cluster (IPC) | In the left side of the IP | ||
Low Engine Coolant Level Indicator Switch (Cat® Diesel) | On the right side of the radiator, on the lower left bottom side of the radiator surge tank | ||
Low Engine Coolant Level Indicator Switch (GM Diesel) | On the right side of the radiator, on the lower left bottom side of the radiator surge tank | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Multifunction Alarm Module (MFAM) (Cat® Diesel) | In the center of the IP harness, behind the right access panel | Engine Controls Component Views in Engine Controls (Caterpillar®) | -- |
C1 (16 cavities) | In the IP harness, to the MFAM | Engine Controls Component Views in Engine Controls (Caterpillar®) | Engine Controls Connector End Views in Engine Controls (Caterpillar®) |
C2 (4 cavities) (with Automatic Engine Shutdown) | In the IP harness to the MFAM | Engine Controls Component Views in Engine Controls (Caterpillar®) | Engine Controls Connector End Views in Engine Controls (Caterpillar®) |
Multifunction Alarm Module (MFAM) (Gasoline) | In the center of the IP, behind the right access panel | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Multifunction Alarm Module (MFAM) (GM Diesel) | In the center of the IP, behind the right access panel | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Multifunction Alarm Module (MFAM) Jumper (Shunt) (Cat® Diesel w/ out Automatic Engine Shutdown) | In the IP harness, taped to the main harness, between the IP fuse block and MFAM breakouts | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Park Brake Switch (ABS-Air) | On the right side of the IP, on the park brake valve | Lighting Systems Component Views in Lighting Systems | Lighting Systems Connector End Views in Lighting Systems |
Park Brake Switch (ABS Hydraulic) | On the left kick panel, to the right rear of the park brake lever | ||
Powertrain Control Module (PCM) (Cat® Diesel) | On the left rear side of the engine block | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Powertrain Control Module (PCM) (Gasoline) | Under the right side of the IP | Engine Controls Component Views in Engine Controls | -- |
C1 (32 cavities) | In the engine harness, to the PCM | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
C2 (24 cavities) | In the engine harness, to the PCM | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Powertrain Control Module (PCM) (GM Diesel) | Under the right side of the IP | Engine Controls Component Views in Engine Controls | -- |
C1 (32 cavities) | In the engine harness, to the PCM | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
C2 (24 cavities) | In the engine harness, to the PCM | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
C3 (32 cavities) | In the engine harness, to the PCM | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Primary Water-In-Fuel Sensor (GM Diesel) | On the inboard side of right frame, forward, part of the primary fuel/ water separator (fuel filter) | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
Secondary Water-In-Fuel Sensor (GM Diesel) | On the inboard side of the right frame rail, behind the primary, part of the secondary fuel/ water separator (fuel filter) | Engine Controls Component Views in Engine Controls | |
Speedo Adapter | Under the right side of the IP | ||
Speedometer | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
Tachometer | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
Upfitter Connector (C212, 23 cavities) | Under the left side of the IP, by the left kick panel | Power and Grounding Component Views in Wiring Systems | Power and Grounding Connector End Views in Wiring Systems |
Upfitter Connector Jumper (Shunt) (23 cavities) | Under the left side of the IP, by the left kick panel | Power and Grounding Component Views in Wiring Systems | Power and Grounding Connector End Views in Wiring Systems |
Voltmeter | On the left side of the IP, part of the instrument panel cluster (IPC) | -- | |
Water-In-Fuel Sensor (GM Diesel) | On the inboard side of the right frame rail, part of the fuel/ water separator (fuel filter) | Engine Controls Component Views in Engine Controls | Engine Controls Connector End Views in Engine Controls |
C100 (2 cavities) (GM Diesel) | In the GM diesel engine harness, to the glow plug harness, on the top left side of the engine | -- | Inline Harness Connector End Views in Wiring Systems |
C109 (8 cavities) (GM Diesel) | In the engine harness, to the GM diesel engine harness, on the top left center of the engine, in the center | -- | Inline Harness Connector End Views in Wiring Systems |
C110 (10 cavities) (GM Diesel) | In the engine harness, to the GM diesel engine harness, on the top left center of the engine, in the center | -- | Inline Harness Connector End Views in Wiring Systems |
C116 (5 cavities) (Cat® Diesel) | In the engine harness, to the fuel tank harness, at the right frame rail, near the starter | -- | Inline Harness Connector End Views in Wiring Systems |
C116 (5 cavities) (Gasoline) | In the engine harness, to the fuel tank harness, at the right frame rail, near the starter | -- | Inline Harness Connector End Views in Wiring Systems |
C116 (5 cavities) (GM Diesel) | In the engine harness, to the fuel tank harness, at the right frame rail, near the starter | -- | Inline Harness Connector End Views in Wiring Systems |
C119 (7 cavities) (Cat® Diesel) | In the ABS-hydraulic jumper harness, to the ABS-hydraulic chassis harness, in the engine compartment, on the left side of the bulkhead | -- | Inline Harness Connector End Views in Wiring Systems |
C119 (7 cavities) (Gasoline) | In the engine harness, to the ABS-hydraulic chassis harness, in the engine compartment, on the left side of the bulkhead | -- | Inline Harness Connector End Views in Wiring Systems |
C119 (7 cavities) (GM Diesel) | In the ABS-hydraulic jumper harness, to the ABS-hydraulic chassis harness, in the engine compartment, on the left side of the bulkhead | -- | Inline Harness Connector End Views in Wiring Systems |
C200 (56 cavities) (GM Diesel) | In the IP harness, to the engine harness, under the right side of the IP | -- | Inline Harness Connector End Views in Wiring Systems |
C208 (8 cavities) (GM Diesel) | In the engine harness, to the IP harness, under right center of the IP | -- | Inline Harness Connector End Views in Wiring Systems |
C217 (8 cavities) (Cat® Diesel) | In the IP harness, to the engine harness, near the far right side of the interior bulkhead below the flasher relay center | -- | Inline Harness Connector End Views in Wiring Systems |
C223 (2 cavities) (ABS-Hydraulic) | In the park brake switch jumper, to the IP harness, in the left kick panel, over the rear park brake lever | -- | Inline Harness Connector End Views in Wiring Systems |
C232 (3 cavities) (ABS-Hydraulic) | In the IP harness, inline to the ABS-hydraulic brake harness, near the left side of the interior bulkhead | -- | Inline Harness Connector End Views in Wiring Systems |
C404 (3 cavities) (Electric-Operated Shift System) | In two-speed rear axle jumper harness, to the two-speed rear axle harness | -- | Inline Harness Connector End Views in Wiring Systems |
D200 (Charge Indicator Diode) (Cat® Diesel) | In the IP harness, in the main harness, the in-line generator diode, approximately 4 cm (1.6 in) to the left of the data link connector (DLC) breakout | -- | -- |
D201 (ABS Diode) (ABS-Hydraulic) | In the IP harness, approximately 4 cm (1.6 in) from the MaxiFuse® block/ mini-relay center | -- | -- |
G100 (Cat® Diesel) | From the starter motor end ground stud (G101) to the right frame rail ground (G100) | -- | -- |
G100 (Gasoline) | From the starter motor side ground stud (G103) to the right frame rail ground (G100) | -- | -- |
G100 (GM Diesel) | From the starter motor side ground stud (G103) to the right frame rail ground (G100) | -- | -- |
G101 (Cat® Diesel) | From the starter motor end ground stud (G101) to the right frame rail ground (G100) | -- | -- |
G101 (GM Diesel w/ Left Fuel Tank and Dual Batteries) | From the negative battery cable at the right frame rail | -- | -- |
G102 (Cat® Diesel) | From the engine harness, to the lower right front side of the engine | -- | -- |
G102 (Gasoline) | From the engine harness, to the back of the left cylinder head | -- | -- |
G102 (GM Diesel) | From the engine harness, to the right side of the top front of the engine | -- | -- |
G208 | From the IP harness, on the top left side of the steering column | -- | -- |
G401 | From the negative battery cable to the right frame rail | -- | -- |
P100 | On the right side of the bulkhead | -- | -- |
P103 | On the left side of the bulkhead | -- | -- |
S125 | In the engine harness, approximately 12 cm (4.7 in) from the brake switches breakout | -- | -- |
S125 (Cat® Diesel) | In the engine harness, approximately 4 cm (1.6 in) forward of the brake switches, in the main harness | -- | -- |
S125 (GM Diesel) | In the engine harness, approximately 29 cm (11.4 in) to the rear of the power brake booster pump motor breakout | -- | -- |
S132 (GM Diesel) | In the engine harness, approximately 10 cm (3.9 in) to the rear of the glow plug relay breakout, toward the bulkhead | -- | -- |
S138 (Cat® Diesel) | In the engine harness, approximately 11 cm (4.3 in) from the main harness, toward the forward lamps harness connector | -- | -- |
S138 (GM Diesel) | In the engine harness, approximately 20 cm (7.9 in) toward the forward lamps harness connector from the fuel tank harness | -- | -- |
S141 | In the engine harness, approximately 17 cm (6.7 in) throttle position (TP), from generator harness breakout | -- | -- |
S142 (Gasoline) | In the engine harness, approximately 4 cm (1.6 in) from the throttle position (TP) sensor, toward the breakout | -- | -- |
S142 (Cat® Diesel) | In the engine harness, approximately 4 cm (1.6 in) | -- | -- |
S142 (GM Diesel) | In the engine harness, approximately 11 cm (4.3 in) from the power brake booster pump motor breakout, toward the brake fluid switches | -- | -- |
S143 (Cat® Diesel) | In the engine harness, approximately 4 cm (1.6 in) from the generator toward bulkhead | -- | -- |
S210 | In the IP harness, approximately 4 cm (1.6 in) to the right of the hazard warning switch breakout | -- | -- |
S213 | In the IP harness, approximately 9 cm (3.5 in) to the left of the hazard warning switch breakout | -- | -- |
S214 | In the IP harness, approximately 25 cm (9.8 in) to the right of the data link connector (DLC) breakout | -- | -- |
S219 | In the IP harness, approximately 17 cm (6.7 in) to the right of the data link connector (DLC) breakout | -- | -- |
S220 | In the IP harness, approximately 15 cm (5.9 in) to the right of the data link connector (DLC) breakout | -- | -- |
S221 | In the IP harness, approximately 12 cm (4.7 in) to the right of the data link connector (DLC) breakout | -- | -- |
S225 (Cat® Diesel) | In the IP harness, at the anode (+) end of the charge indicator diode (D200), approximately 4 cm (1.6 in) to the right of the data link connector (DLC) breakout | -- | -- |
S226 (Cat® Diesel) | In the IP harness, at the cathode (-) end of the charge indicator diode (D200), approximately 10 cm (3.9 in) to the right of the data link connector (DLC) breakout | -- | -- |
S227 | In the IP harness, approximately 57 cm (22.4 in) from the headlamps dimmer switch breakout | -- | -- |
S228 (GM Diesel) | In the IP harness, approximately 11 cm (4.3 in) to the right of the instrument panel cluster (IPC) connector breakout | -- | -- |
S231 | In the IP harness, approximately 66 cm (26.0 in) from the main harness, toward the IP harness connector | -- | -- |
S232 | In the IP harness, approximately 59 cm (23.2 in) from the main harness, toward the IP harness connector | -- | -- |
S234 | In the IP harness, approximately 4 cm (1.6 in) to the right of the daytime running lights (DRL) module breakout | -- | -- |
S235 (ABS-Hydraulic) | In the IP harness, at the cathode (-) end of the ABS diode (D201), approximately 4 cm (1.6 in) from the MaxiFuse® block/ mini-relay center, toward the bulkhead | -- | -- |
S236 (ABS-Hydraulic) | In the IP harness, at the anode (+) end of the ABS diode (D201), approximately 4 cm (1.6 in) from the MaxiFuse® block/ mini-relay center, toward the bulkhead | -- | -- |
S261 (ABS-Hydraulic) | In the ABS-hydraulic jumper harness, approximately 40 cm (15.7 in) from the exterior bulkhead pass-through P103 | -- | -- |
S262 (ABS-Hydraulic) | In the ABS-hydraulic jumper harness, approximately 46 cm (18.1 in) from the exterior bulkhead pass-through P103 | -- | -- |
S408 | In the fuel tank harness, approximately 7 cm (2.8 in) forward of the fuel pump breakout | -- | -- |
