Theory Of Operation

Fig 1: 5-Volt Supply Circuit Diagram

Courtesy of CHRYSLER GROUP, LLC

The purpose of the following procedure is to demonstrate how to check the voltage of a 5-Volt supply circuit with a voltmeter.

NOTE:

The circuit shown in the illustration is an example, and is intended for demonstrational purpose only.

The following are circuit tests covered in this procedure:

NOTE:

Perform the following test using a known good 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 IN-LINE CONNECTOR (BENT, PUSHED OUT OR CORRODED TERMINALS)
ELECTRONIC CONTROL MODULE (5-VOLT SUPPLY OUTPUT)