GM Service Manual Online
For 1990-2009 cars only

Engine Electrical Components P42

Name

Location

Locator View

Connector End View

Battery

On the RH frame rail to the rear of the engine

Engine Electrical Component Views

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Battery Junction Block

On the forward LH side of the bulkhead above P100

Power and Grounding Component Views in Wiring Systems

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Battery, Secondary (Diesel)

On the RH frame rail to the rear of the engine

Engine Electrical Component Views

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Clutch Pedal Position (CPP) Switch

On the LH side of the brake pedal bracket

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Crank Fuse

On the upper RH side of the steering column support

Power and Grounding Component Views in Wiring Systems

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Generator

At the RH front of the engine

Engine Electrical Component Views

Engine Electrical Connector End Views

Ignition Switch

On the lower RH side of the steering column below the support bracket

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Instrument Cluster

Body builder installed

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Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges and Console

IP Fuse Block

Located by the body builder

Electrical Center Identification Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Park/Neutral Position and Backup Lamps Switch

On the LH side of the transmission near the middle

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Starter Motor

At the lower RH side of the engine

Engine Electrical Component Views

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Starter Relay

On the engine bulkhead relay bracket under the battery junction block

Engine Electrical Component Views

Engine Electrical Connector End Views

Starter Solenoid

On the starter at the lower RH side of the engine

Engine Electrical Component Views

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Tachometer (provision for)

Engine harness taped to the ignition coil breakout

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C102

Engine harness to the generator harness at the RH front of engine below the generator

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

Engine harness to the IP harness, in the bulkhead near P100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G102 (Diesel with Manual Trans)

At the RH front of the engine near the generator bracket

Power and Grounding Component Views in Wiring Systems

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G102 (All Gasoline, Diesel with Auto Trans)

At the rear of the LH cylinder head

Power and Grounding Component Views in Wiring Systems

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G105

At the rear of the RH cylinder head

Power and Grounding Component Views in Wiring Systems

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G200

LH interior bulkhead near the relay bracket

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P100

LH bulkhead left of the steering column

Harness Routing Views in Wiring Systems

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S109 (MFI Diesel)

In the engine harness, approximately 33 cm (13 in) from P100

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S110 (Gasoline)

In the engine harness, approximately 4 cm (2 in) from the breakout for C200 towards P100

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S110 (Diesel)

In the engine harness, approximately 4 cm (2 in) from the breakout for the ABS harness connectors C110 and C111

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S112 (MFI Diesel with Auto Trans)

In the engine harness, approximately 16 cm (6 in) from the starter motor breakout toward P100

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S112 (MFI Diesel with Manual Trans/EFI Diesel)

In the engine harness, approximately 4 cm (2 in) from the starter motor breakout toward the A/C compressor connectors

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S112 (Gasoline)

In the engine harness, approximately 7 cm (3 in) from the breakout for the ignition control module toward C102

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S113

In the engine harness at the starter solenoid interconnect fusible link C3

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S118 (MFI Diesel)

In the engine harness, approximately 15 cm (6 in) from the glowplug controller breakout towards the generator

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S118 (EFI Diesel)

In the engine harness, approximately 4 cm (2 in) from the starter motor breakout towards the rear chassis connector C300

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S118 (Gasoline)

In the engine harness at the LH rear of engine, approximately 4 cm (2 in) from G102/G104 breakout toward the bank 1 HO2S

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S128

In the engine harness at the battery junction block fusible link C2

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S132 (Gasoline)

In the engine harness, approximately 19 cm (8 in) from the C200 breakout towards the MAF sensor

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S205

In the IP harness, approximately 4 cm (2 in) before the fuse block breakout toward C200

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S207

In the IP harness, approximately 40 cm (16 in) from the fuse block toward the instrument cluster connector

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Engine Electrical Components P32

Name

Location

Locator View

Connector End View

Battery (L29)

RH frame rail behind the engine

Go to Engine Electrical Component Views

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Battery Junction Block

On the forward LH side of the bulkhead

Go to Engine Electrical Component Views

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Crank Fuse (L29/L65)

In the auxiliary fuse block

Go to Engine Electrical Component Views

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Generator

On the RH front of the engine

Go to Engine Electrical Component Views

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IP Fuse Block

Mounted on the IP

Go to Engine Electrical Component Views

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Ignition Switch

On the steering column

Go to Engine Electrical Component Views

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Park/Neutral Position (PNP) Switch and Backup Lamps Switch

On the LH side, near the middle of the transmission

Go to Engine Electrical Component Views

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Secondary Battery (L65)

On the RH side frame rail behind the engine

Go to Engine Electrical Component Views

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Starter Motor (L29)

On the RH side, rear of the engine

Go to Engine Electrical Component Views

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Starter Motor (L65)

On the RH side, rear of the engine

Go to Engine Electrical Component Views

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Starter Relay (L29)

At the relay center on the RH side of the driver's island support

Go to Engine Electrical Component Views

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Starter Solenoid

At the starter motor

Go to Engine Electrical Component Views

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C200

45 cm from P100, mounted on the driver's island

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Go to Engine Electrical Connector End Views

G104 (L29)

35 cm from the breakout for the ignition coil

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G104 (L65)

35 cm from the breakout for the ignition coil

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G105

Negative battery cable

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P100

Main wiring pass-through at the bulkhead

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S115 (L29/L65)

Engine harness, 34 cm from the breakout for the windshield wiper motor, toward the engine

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S125 (L29)

Engine harness, 5 cm from the breakout for the EGR, toward the injector harness

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S125 (L65)

Engine harness, 9 cm from the breakout for the generator, toward the generator connector

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S135 (L29)

Engine harness, 7 cm from the breakout for the H02 sensors, toward the ignition coil

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S135 (L65)

Engine harness, 7 cm from the breakout for the glowplug controller, toward the glowplugs

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S136 (L29/L65)

Engine harness, 16 cm from the battery junction block stud E

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S154

IP harness, 12 cm from the breakout for the headlamp switch, toward the fuse panel

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