Heated Glass Element: Testing and Inspection

Function Test

NOTE:
- Be careful not to scratch or damage the rear window defogger wires with the tester probe.
- Before testing, check the No. 11 (20 A) fuse in the under-hood fuse/relay box and No. 14 (10 A) fuse in the under-dash fuse/relay box.




1. Check for voltage between the positive terminal (A) on the right side of the glass and body ground with the ignition switch and rear window defogger switch ON. There should be battery voltage.
- If there is no voltage, check for:
- Faulty rear window defogger relay.
- An open in the BLK, BLK/GRN, BLK/YEL, or YEL/BLK wire.
- Faulty heater control panel.
- If there is battery voltage, go to step 2.

2. Disconnect the negative terminal (B), then check for continuity between the negative terminal and body ground.
If there is no continuity, check for:
- An open in the BLK wire.
- Poor ground (G553 and G771).

3. Reconnect the negative terminal, then touch the voltmeter positive probe to the halfway point of each rear window defogger wire, and the negative probe to the negative terminal. There should be about 6 V with the ignition switch and the rear window defogger switch ON.
- If the voltage is as specified, the rear window defogger wire is OK.
- If the voltage is not as specified, repair the rear window defogger wire.
- If there is battery voltage, there is a break in the negative half of the grid.
- If there is 0 V, there is a break in the positive half of the grid.