On-Vehicle Inspection
- INSPECT BACK WINDOW
- Prepare a piece of tin foil to wrap the tip of the negative tester probe.NOTE:
- When cleaning the glass, wipe the glass along the wire using a soft and dry cloth. Take care not to damage the wires.
- Do not use detergents or glass cleaners that have abrasive ingredients.
- When measuring voltage, wrap a piece of tin foil around the tip of the negative tester probe and press the foil against the wire with your finger, as shown in the illustration.
- Turn the ignition switch on (IG).
- Turn the defogger switch on.
- Check the voltage at the center of each defogger wire, as shown in the illustration.
Voltage
VOLTAGE SPECIFICATIONVoltage Criteria Appox. 5 V Wire is not broken Appox. 10 or 0 V Wire is broken - If there is approximately 10 V, the wire may be faulty between the center of the wire and the wire end on the battery side.
- If there is no voltage, the wire may be faulty between the center of the wire and the wire end on the ground side.
- Place the voltmeter's positive (+) lead against the defogger wire on the battery side.
- Place the voltmeter's negative (-) lead with the foil strip against the wire on the ground side.
- Slide the positive (+) lead from the battery side to the ground side.
- The point where the voltage jumps from approximately 10 V to 0 V is where the defogger wire is broken.
HINT:
If the defogger wire is not broken, the voltmeter should indicate 0 V at the positive (+) end of the defogger wire but gradually increases to approximately 12 V as the meter probe moves to the other end.
- Prepare a piece of tin foil to wrap the tip of the negative tester probe.