Theory Of Operation
The purpose of the following procedure is to demonstrate how to check the voltage of a 12-Volt switched battery B(+) circuit with a test light or voltmeter.
NOTE:
The circuit shown in illustration is an example, and is intended for demonstrational purpose only.
The following are circuit tests covered in this procedure:
- Testing 12-Volt Switched Battery B(+) Circuit Voltage With A Test Light
- Testing 12-Volt Switched Battery B(+) Circuit Voltage With A Voltmeter
NOTE:
Perform the following test using a known good test light or functioning multimeter.
Below is a list of possible causes that could be related to a No Voltage condition.
| Possible Causes |
|---|
| OPEN CIRCUIT (CHAFED, PIERCED, PINCHED OR BROKEN WIRES) |
| OPEN FUSE |
| FAULTY SWITCH |
| OPEN IN-LINE CONNECTOR (BENT, PUSHED OUT OR CORRODED TERMINALS) |