Trooper S 4WD V6-3.5L (2002)
This test checks for voltage drop along a wire, or through a connection or switch.
1. Connect the positive lead of a voltmeter to the end of the wire (or to the side of the connector or switch) closest to the battery.
2. Connect the negative lead to the other end of the wire (or the other side of the connector or switch).
3. Operate the circuit.
4. The voltmeter will show the difference in voltage between the two points. A difference, or drop of more than 0.5 volts may indicate a problem.
Check the circuit for loose or dirty connections.
Testing For Short to Ground With Test Light or Voltmeter
1. Remove the blown fuse and disconnect the load.
2. Connect a test light or voltmeter across the fuse terminals. Make sure voltage is being applied to the battery side fuse terminal. Check schematic to
see if the ignition switch needs to be in RUN.
3. Beginning near the fuse box, wiggle the harness. Continue this at convenient points about six inches apart while watching the test light or
voltmeter.
4. When the test light blinks or the voltmeter needle moves, there is a short to ground in the wiring near that point.
Testing For A Short With A Self-Powered Test Light or Ohmmeter
