INSTRUMENTATION SERVICE MANUAL NUMBER 22
Page 4D-6 90-860074--1 FEBRUARY 2002
General Information
IMPORTANT: If all instruments appear suspect, an electrical overload may have
occurred. A fuse may be defective or a circuit breaker may be tripped open. The cause
must be found and corrected before replacing fuse or resetting circuit breaker.
IMPORTANT: If all instruments appear suspect, check the main harness or electrical
connector to ensure good contact.
Before testing individual instruments, check the following:
• Battery is fully charged.
• Circuit breaker is closed.
• All wires in circuit are connected.
• All connections are tight and corrosion free.
• Connectors are fully engaged.
CAUTION
Avoid short circuits. It may be necessary to remove instrument panel or Engine
System Monitor panel from dashboard to gain access to instruments and switches.
Do not allow wires to come in contact with metal or other wires.
Special Information
Tachometer
If using the Quicksilver Tachometer provided for the D2.8L D-Tronic and D4.2L D-Tronic
Engines engine packages, the appropriate setting of the switch located on the back of the
tachometer is given in the following chart.
Tachometer Switch Setting
Model Number of Cylinders Switch Position
D2.8L D-Tronic 4 1
D4.2L D-Tronic 6 2
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