D330, D333, 3304, 3306 – Electrical System Diagrams

A variety of electrical systems can be used with these engines. Some systems are available with one 32 volt, 24 volt or 12 volt starting motor. Where 30 volt (15 cell battery) system is used, the 32 volt diagram applies. Other systems without electric starting motors are provided for use with air starting and hydraulic starting.

Glow plugs provide for low temperature starting. Glow plugs are not required where ideal starting conditions exist. These diagrams show only the HEAT-START switch with glow plugs. Systems without glow plugs use a push button switch with two post connections to energize the starter solenoid.

A fuel pressure switch in all systems prevents alternator field excitation. Thus damage to the alternator from the battery is prevented when the engine is not operating.

Automatic START-STOP wiring diagrams are shown for the complete system in the ATTACHMENT section of this manual.

Negative Ground Systems
These systems are most often used in applications where no special precautions are necessary to prevent local radio interference and/or electrolysis of grounded components.


NEGATIVE GROUND 24V: 60 AMP. AND 32V: 60 AMP. SYSTEM WITH GLOW PLUGS (DELCO REMY)


NEGATIVE GROUND 24V: 35 AMP. OR 12V: 35 AMP. SYSTEM WITH GLOW PLUGS (MOTOROLA)

NEGATIVE GROUND 24V: 45 AMP. OR 12V: 60 AMP. SYSTEM WITH GLOW PLUGS (DELCO REMY)

NEGATIVE GROUND 24V: 60 AMP. OR 32V: 60 AMP. SYSTEM WITH GLOW PLUGS FOR USE WITH AIR OR HYDRAULIC STARTING (DELCO REMY)

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