Rainier 2WD V8-5.3L VIN P (2004)
Body Control Module: Diagnostic Aids
Measuring Voltage
MEASURING VOLTAGE
NOTE: Refer to Test Probe Notice in Service Precautions.
The following procedure measures the voltage at a selected point in a circuit.
1. Disconnect the electrical harness connector for the circuit being tested, if necessary.
2. Enable the circuit and/or system being tested. Use the following methods:
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Turn ON the ignition, with the engine OFF.
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Turn ON the engine.
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Turn ON the circuit and/or system with a scan tool in Output Controls.
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Turn ON the switch for the circuit and/or system being tested.
3. Select the V (AC) or V (DC) position on the DMM.
4. Connect the positive lead of the DMM to the point of the circuit to be tested.
5. Connect the negative lead of the DMM to a good ground.
6. The DMM displays the voltage measured at that point.