Workshop Manual

TROUBLESHOOTING INSTRUCTION
WS-13
TROUBLESHOOTING TEST
Testing For Voltage
This test measures voltage in a circuit. When testing for voltage at
a connector, you do not have to separate the two halves of the
connector. Instead, probe the connector from the back. Always
check both sides of the connector because dirt and corrosion
between its contact surfaces can cause electrical problems.
1. Connect one lead of a test lamp or voltmeter to a ground. If you
are using a voltmeter, be sure it is the voltmeter’s negative lead
test you have connected to ground.
2. Connect the other lead of the test lamp or voltmeter to a
selected test point (connector or terminal).
3. If the test lamp glows, there is voltage present. If you are using
a voltmeter, note the voltage reading.
A loss of more than 1 volt from specifications indicates a
problem.
Testing For Continuity
1. Disconnect the battery negative terminal.
2. Connect one lead of a self-powered test lamp or ohmmeter to one
end of the part of the circuit you wish to test. If you are using an
ohmmeter, hold the leads together and adjust the ohmmeter to read
zero ohms.
3. Connect the other lead to the other end.
4. If the self-powered test lamp glows, there is continuity. If you are
using an ohmmeter, low or zero resistance means good continuity.
Testing For Short To Ground
1. Remove the blown fuse and disconnect the battery and load.
3. Connect one lead of a self-powered test lamp or an ohmmeter to
the fuse terminal on the load side.
3. Connect the other lead to a ground.
4. Beginning near the fuse block move the harness from side to
side. Continue this point (about six inches apart) while watching the
selfpowered test lamp or ohmmeter.
5. When the self-powered test lamp glows, or ohmmeter registers,
there is a short to ground in the wiring near that point.