Measuring Voltage
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Refer to TEST PROBE NOTICE
.
The following procedure measures the voltage at a selected point in a circuit.
- Disconnect the electrical harness connector for the circuit being tested, if necessary.
- Enable the circuit and/or system being tested. Use the following methods:
- Turn ON the ignition, with the engine OFF.
- Turn ON the engine.
- Turn ON the circuit and/or system with a scan tool in Output Controls.
- Turn ON the switch for the circuit and/or system being tested.
- Select the V (AC) or V (DC) position on the DMM.
- Connect the positive lead of the DMM to the point of the circuit to be tested.
- Connect the negative lead of the DMM to a good ground.
- The DMM displays the voltage measured at that point.