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Test Description Chevrolet Chevy Express H2500

Stationary Window System 5 illustrations ~218 words

Test Description

The number below refers to the step number on the diagnostic table.

Scheme 9

Scheme 9: Test Description
Scheme 9: Test Description

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11
  1. 9. Listen for an audible click when the RR DEFOG relay operates. Command both the ON and OFF states of the RR DEFOG relay. Repeat the commands as necessary.

Scheme 12

Scheme 12: Defogger Indicator Always On
Scheme 12: Defogger Indicator Always On

Scheme 13

Scheme 13: Defogger Grid Lines Diagnosis
Scheme 13: Defogger Grid Lines Diagnosis
  1. Start the engine.
  2. Activate the rear window defogger system.
  3. Connect a test lamp to a good ground. Important: The test lamp brilliance will decrease proportionately to the increased resistance in the grid line as the probe is moved from the battery positive bus wire to the ground bus wire. The test lamp brilliance may vary from one window to another.
  4. Move the test lamp probe from zone 5 to zone 1 along each grid line. If the test lamp shows full brilliance at both ends of the grid lines. Inspect for an open or poor connection in the ground circuit of the rear window defogger grid. Refer to «TESTING FOR INTERMITTENT AND POOR CONNECTIONS»(/chevrolet/chevy-express-h2500/2003-2003/remont/electrical-component-locations/#wiring-systems-general-information__testing-for-intermittent-and-poor-connections) and «CONNECTOR REPAIRS»(/chevrolet/chevy-express-h2500/2003-2003/remont/electrical-component-locations/#wiring-systems-general-information__connector-repairs) . If the test lamp goes out, test the grid line in at least 2 places (1,3) to eliminate the possibility of bridging the open (2) in the grid line.
  5. Once the open (2) is located, repair the grid line. Refer to «Grid Line Repair»(/chevrolet/chevy-express-h2500/2003-2003/remont/heated-glassdefoggers/#stationary-window-system__grid-line-repair) .