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Chevrolet Workshop Service and Repair Manuals

Sensors and Switches - Windows and Glass > < Diagnostic Trouble Code Tests and Associated Procedures|Page 6541
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Control for an open (see schematic). If OK, do Test A.

^ If test lamp bulb shows full brilliance at both ends of the grid, check BLK (150) wire for an open to ground (see schematic).

^ If the test lamp suddenly lights as it is moved along the grid, a break in the continuity of the grid line exists. Repair grid line(s).

Defogger Test

Sensors and Switches - Windows and Glass > < Diagnostic Trouble Code Tests and Associated Procedures|Page 6541