S40 L4-1.9L Turbo VIN 29 B4204T3 (2001)
A short-circuit between a live cable and ground is often indicated by the loss of a function or a fuse blowing when a current is passed through the cable.
Checks:
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Check the cables visually according to Inspect terminals visually.
Activate all switches and sensors in the circuit. Check whether the fuse blows
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Disconnect the connectors in the circuit to ensure that they do not affect readings.
Connect an ohmmeter between cable and ground.
The ohmmeter should read infinite resistance if no components are connected.
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 Contact resistance and oxidation.
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.
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 Contact resistance and oxidation.
Loose connections (terminals)
