Short-Circuit to Supply Voltage. Intermittent Faults

Short-circuit to supply voltage, intermittent faults







A short-circuit between a cable and supply voltage is often indicated by the loss of a function or a fuse blowing when a current is passed through the cable.

Repair wiring and cable terminals, using appropriate procedures.

Checks:
- Check the cables visually according to "Inspect Terminals Visually". Use a voltmeter to take readings at various points in the circuit while operating switches and sensors.

The voltmeter reading depends on the circuit being tested and the positions of switches and sensors. Use the wiring diagram to determine the correct voltage in the circuit.
Use an ohmmeter between the suspect cables to detect short-circuits between them.
The ohmmeter should read infinite resistance between cables not connected to each other in the circuit. Shake the cable lightly and pull on connectors during measurement to locate the damage.
If the reading is not correct. Replace the cable and/or continue according to "Loose Connections (Terminals)".