Jeep Cherokee 1977, Owner'S Manual

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Instrument Panel Controls
and Indicators
Speedometer
The Speedometer is cable driven by gears in the transfer
case. Gears are calibrated to axle ratio and tire size for
reasonably accurate miles-per-hour readings.
Odometer
The Odometer is coordinated with the speedometer to regis­
ter distance in statute miles. It records up to 99,999.9 miles,
and then restarts at zero. A ratchet device prevents turning
the odometer backward.
Fuel Gauge
The fuel gauge indicates how much fuel is in the fuel tank.
The pointer will drop back to the E (empty) mark when the
ignition switch is turned off. It may take a moment for the
gauge to record when the ignition switch is again turned on. It
is normal for the pointer to fluctuate at times as the vehicle is
driven over rough terrain. Reduce water condensation by
keeping the tank nearly full rather than nearly empty.
Engine Temperature Gauge
The temperature gauge registers the temperature of the solu­
tion in the cooling system. If the needle of the gauge swings
far into the H (hot) zone, it means the engine is running
dangerously hot. Stop and investigate.
WARNING:
If the engine is overheated, be extremely careful.
Let the engine idle for a period above normal idle speed with
the hood up-unless all coolant has been lost. Shut off the
engine and let it cool for 15 minutes, then remove the cap as
follows. Turn the cap slowly to the first notch to let any pres­
sure escape before removing the cap. Use a heavy rag or
towel wrapped over the cap to avoid injury. Never add coolant
when the engine has overheated; allow the engine to cool fi;st.
Voltmeter
This instrument is used on CJ models and indicates whether
the battery has sufficient electrical charge for vehicle starting
and operation of accessories. It also indirectly shows the
condition of the alternator and regulator as a function of
voltage input to the battery.
Normal operating range is between 12.8 and 14.8 volts (slightly
higher in cold weather starting). Prolonged gauge readings be­
tween 8 to 12 (undercharge) or between 14 to 15.5 (overcharge)
indicate possible malfunction of alternator,regulator,or battery.