Component Diagnostic Tests - Rear Window Defogger & Heated Mirrors (SSE & SSEI Models)

TESTING REAR WINDOW DEFOGGER GRID LINES

1. Start the engine and turn on the defogger system.
2. Ground an unpowered test lamp and lightly touch the prod tip to each grid line.

- Move the lamp from the feed wire side to the grounded side of each grid. The lamp should be fully bright then gradually dim as it is moved across the grid. Be sure to check each grid line in at least two places to avoid the possibility of bridging a gap.

3. If the test lamp shows full brilliance at both ends of the grid line, check for a loose ground wire connection to the sheet metal.

4. If the lamp suddenly goes out as it is moved across the grid, a break has been located.