Testing For A Short to Ground
1. Remove the fuse and disconnect all items involved with the fuse.2. Connect a test light or a voltmeter across the terminals of the fuse.
3. Starting at the fuse block, wiggle the wiring harness about six to eight inches apart and watch the voltmeter/test lamp.
4. If the voltmeter registers voltage or the test lamp glows, there is a short to ground in that general area of the wiring harness.
TESTING FOR A SHORT TO GROUND ON FUSES POWERING SEVERAL LOADS
1. Refer to the wiring diagrams and disconnect or isolate all items on the fused circuit.
2. Replace the blown fuse.
3. Supply power to the fuse by turning ON the ignition switch or re-connecting the battery.
4. Start connecting the items in the fuse circuit one at a time. When the fuse blows the circuit with the short to ground has been isolated.