Electrical Systems - Chassis
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DIPLOMAT
9•240
1. Air Pressure Gauge:
Indicates air system pressures. The normal air system operating pressures are 90 to 120 psi. These air pressures
are preset at the factory. If a problem occurs with air system not maintaining normal operating pressure it is an
indication of a malfunction in the air system. Use caution and stop the motorhome in a safe area. Contact your
service center immediately.
NOTE: It is not safe to drive the motorhome with low air pressure. Damage can occur
to the suspension and drive line. The operation of the air brake system is also affected.
2. Voltmeter:
Shows the charge condition in the chassis battery. The normal voltage with the ignition switch ON and the
engine OFF varies between 12.0 and 13.0 volts. With the engine operating without a heavy load the battery
charging voltage is about 14.0 Volts. Battery readings of less than 10.5, or more than 15.0 Volts, usually indi-
cates a battery or electrical system problem.
3. Turbo Boost:
Indicates boost pressure produced by engine turbocharger.
4. Tachometer:
Displays engine speed in revolutions per minute (RPM). Tachometer reads output pulse of alternator. If
tachometer quits, or indicates irratically, have alternator checked immediately.
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