G 2500 3/4 Ton Van V8-350 5.7L VIN K TBI (1995)
1. Remove the blown fuse leaving the battery connected.
2. Connect the short finder across the fuse terminals.
3. Close all switches in series with the circuit you are troubleshooting.
4. Operate the short finder. The short finder will pulse current to the short. This creates a pulsing magnetic field surrounding the circuit wiring
between the fuse block and the short.
5. Beginning at the fuse block, slowly move the short finder meter along the circuit wiring. The meter will show current pulses through sheet metal
and body trim. As long as the meter is between the fuse block and the short, the needle will move with each current pulse. When you have moved
the meter past the point of the short, the needle will stop moving. Examine the wiring in that area for the short to ground.
FUSES POWERING SEVERAL LOADS
1. Refer to the schematic for the fuse that has blown.
2. Open the first connector or switch leading from the fuse to each load.
3. Replace the fuse.
^
If the fuse blows, the short is in the wiring leading to the first connector or switch. Use a test lamp or meter as described.
^
If fuse does not blow, refer to next step.
^
Close each connector or switch until the fuse blows in order to find which circuit has the short. Connect test lamp or meter at the connector to
the suspect circuit (disconnected) rather than at the fuse terminals.
Current Test
TESTING FOR CURRENT
To test for current the meter must be connected in series in the circuit. Current measurements always involve a component being removed or
disconnected from the circuit. The circuit current flows through the meter, which displays the current in amps or milliamps. The meter should
have a rating higher than the expected current.
NOTE: Never use a meter set on a current scale to measure voltage. Severe damage to the meter, the circuit, or both will result.
Two commonly used locations for taking current measurements are at a fuse and at the battery.
To measure current in a Windshield Wiper Motor, for instance, the meter should be connected across the fuse terminals, after removing the fuse.
The meter can be inserted in any circuit where a single circuit can be temporarily opened to make the measurement.
