Heated Glass Element: Testing and Inspection
Function TestNOTE: Be careful not to scratch or damage the defogger wires with the tester probe.
1. Check for voltage between the positive terminal (Passenger's side) (A) and body ground with the ignition switch and defogger switch ON. There should be battery voltage.
- If there is no voltage.
- Check for voltage at the WHT/GRN wire at the rear window defogger relay. If there is no voltage at the WHT/GRN wire, check for a blown fuse No.53 (30 A) in the under-hood fuse/relay box or an open in the wire.
- With the ignition switch ON (II), check for voltage at the BLK/YEL wire of the rear window defogger relay. If there is no voltage at the BLK/YEL wire, check for a blown fuse NO. 3 (7.5 A) in the driver's under-dash fuse/relay box or an open in the wire.
- With the ignition switch ON (II), and the rear window defogger relay installed, jump to ground BRN/YEL wire at the climate control unit (heater control panel). There should be voltage at the BLK/GRN wire. If there is no voltage at the BLK/GRN wire, check for an open in the BLK/GRN wire or a faulty rear window defogger relay.
- If there is battery voltage, go to step 2.
2. Check for continuity between the negative terminal (Driver's side) (B) and body ground. If there is no continuity, check for an open in the defogger ground wire.
3. Touch the voltmeter positive probe to the halfway point of each defogger wire, and the negative probe to the negative terminal. There should be approximately 6 V with the ignition switch and the defogger switch ON.
- If the voltage is as specified, the defogger wire is OK.
- If the voltage is not as specified, repair the defogger wire.
- If it is more than 6 V, there is a break in the negative half of the wire.
- If it is less than 6 V, there is a break in the positive half of the wire.