Part 2 of 4

System Troubleshooting Procedures:

TROUBLESHOOTING TESTS

Voltage Test

This test measures voltage in a circuit. By taking measurements at
several points (terminals or connectors) along the circuit, you can
isolate the problem.

To take a voltage measurement, connect the negative lead of the voltmeter
to the battery's negative terminal or other known good ground. Then
connect the positive lead of the voltmeter to the point you want to
test. The voltmeter will measure the voltage present at that point in
the circuit.


Voltage Drop Test

Wires, connectors and switches are designed to conduct current with
a minimum loss of voltage. A voltage drop of more than one voltage
indicates a problem.

To test for voltage drop, connect the voltmeter leads to connectors
at either end of the circuit's suspected problem area. The positive
lead should be connected to the connector closest to the power source.
The voltmeter will show the voltage drop between these two points.
Any switch in the circuit should be closed during these tests.