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All components of the instrumentation are easily replaceable in the field. This chap-
ter describes the correct method of removing and replacing the system's components.
For troubleshooting information, see Chapter 5. For a functional description of the
instrument system, see Chapter 3.
Note - None of the instrumentation's components can be repaired in the field. Re-
place them if defective. Opening any of the components voids the warranty.
The 2-inch gauges may be opened to replace scaleplates without affecting
the warranty.
Do—
Always unplug all connectors from the
Interface Module before performing any
welding on the vehicle. Extensive and
expensive electronic damage may result
if the wiring is left connected.
The warning lights and the backlighting
in the gauges are LEDs. If a gauge LED
is defective, replace the entire gauge.
Store or hold gauges in their normal op-
erating position or face up to prevent the
gauge dampening fluid from leaking
out.
Apply pressure or vacuum slowly to
transducer modules.
Note - The SMC calculates and stores odometer and trip odometer data. If the
SMC is replaced with one from another vehicle, the odometer will reflect the
other vehicle's accumulated mileage. If a factory-new speedometer is in-
stalled, the odometer will read zero.
Don't—
Do not splice into the data bus at any
time. Incorrect data and false read-
ings can result.
Do not open or attempt to service the
speedometer, tachometer, or Interface
Module or the warranty will be
voided.
Do not store or otherwise leave any
gauge face down longer than 15 min-
utes.
Do not apply pressure to transducer
modules at a rate that exceeds 150 PSI
per second.
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