Short Test Using Voltage:
Short Test Using Voltmeter:
1 Voltmeter
2 Switch for reversing light (OFF)
3 Connection to load disconnected
4 Rear light
5 Battery
A Short to ground
Measuring instrument: Voltmeter
Problem: Short to ground
Test Procedure:
Disconnect voltage source and connect voltmeter with test lead Disconnect the load. Move the lead to the load back and forth and observe the voltmeter reading. If the voltmeter registers a voltage there is a short to ground in the wiring.