82 INSTRUMENTS AND CONTROLS
Voltmeter Gauge (Basic Level Cluster Only)
The voltmeter gauge shows the battery voltage. The voltmeter gauge is included only in the
basic level instrument cluster. Battery voltage is displayed in the DID for the mid and high
level instrument clusters.
Intake Manifold Pressure Gauge (High Level Cluster Only)
The intake manifold pressure gauge indicates intake manifold pressure to the engine. The
pressure generated by the intake manifold pressure should be the same at a given engine
temperature, speed and load. Intake manifold pressure will vary for different engines and
vehicle models. By monitoring the gauge, the operator can avoid engine problems.
Application Air Pressure Gauge (High Level Cluster Only)
Air gauges are connected to the air brake system via sensors. They will indicate the brake
application pressure from either the front, rear or trailer circuit pressure. The gauge will not
register air pressure until the foot brake pedal is depressed or the trailer hand brake is applied.
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