INSTRUMENTATION
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 4D-7
Cruiselog Meter
TESTING
1. Connect jumper wire from positive (+) battery terminal to positive (+) gauge terminal.
2. Connect jumper wire from negative (–) battery terminal to negative (–) gauge terminal.
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3. Observe gauge run indicator. If indicator is turning, gauge is operable; if not, replace
gauge.
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a
a-Indicator
Vacuum Gauge
TESTING
1. Disconnect vacuum hose from engine. Connect service vacuum gauge to engine and
record engine vacuum readings at idle, 1000, 2000 and 3000 rpm. Reconnect vacuum
hose and compare vacuum gauge readings (at specified rpm) with service gauge read-
ings. Readings should be within 3 inches of vacuum of each other.
IMPORTANT: Make sure that vacuum hose between gauge and engine is not leaking
and that all connections are tight.
2. If gauge readings are not within specifications, gauge is defective.
Speedometer
TESTING
IMPORTANT: When testing speedometer gauge for accuracy, the air supply used for
the test must be regulated to the specified air pressure. Do not apply excessive air
pressure to speedometer gauge.
1. Apply air pressure directly to speedometer gauge (specified in chart) and note gauge
reading. Light tapping of pressure gauge is required during accuracy check.
2. If gauge readings are not within specifications, gauge is defective.
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