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Defogger Does Not Turn Off Automatically

  1. Perform CENTRAL TIMER MODULE SELF-TEST  under COMPONENT TESTS. If self-test is okay, go to next step. If self-test is not okay, see appropriate MODULE COMMUNICATIONS NETWORK article.
  2. Disconnect defogger relay. Perform DEFOGGER RELAY TEST  under COMPONENT TESTS. If defogger relay tests okay, go to next step. If defogger relay does not test okay, replace defogger relay.
  3. Turn ignition on. Ensure rear defogger switch is in OFF position. Using a voltmeter, measure voltage between Central Junction Box (CJB) defogger relay connector terminal No. 1 (Green/Red wire) and CJB defogger relay connector terminal No. 2 (Black/Orange wire). See Figure . If voltage is greater than 10 volts, repair short in Black/Orange wire and retest system operation. If voltage is less than 10 volts, verify customer concern.
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