Testing should include

checking the coolant temperature, fuel, vehicle speed, odometer, oil pressure, and tachometer
following procedures for each individual circuit.

Note: Typically, digital and fiber optic gauges and warning circuits are not serviceable by the automotive service technician but are sent to special repair centers when servicing is required.

ASE 1: VII. Cab: B. Instruments and Controls (P-1)

Process/Skill Questions:

What tool might be used to test sensors?
What is a common fault of connectors?
What is the difference between a weather pack connector and a standard connector?