Testing for a Short to Voltage

Testing for a Short to Voltage

Special Tools

EL-39200 - Digital Multimeter (DMM)

For equivalent regional tools, refer to Special Tools Tools and Equipment.

Danger: This procedure should not be performed on high voltage circuits. Performing this procedure on high voltage circuits may result in serious injury or death.


Caution: Refer to Test Probe Caution Test Probe Caution.

The following procedure tests for a short to voltage in a circuit.

1. Remove the power feed (i.e. fuse, control module) from the suspect circuit.
2. Disconnect the load.
3. Set the digital multimeter (DMM) to the V (DC) position.
4. Connect the positive lead of the DMM to one end of the circuit to be tested.
5. Connect the negative lead of the DMM to a good ground.
6. Turn ON the ignition and operate all accessories.
7. If the voltage measured is greater than 1 V, there is a short to voltage in the circuit.