GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Malibu 🢒 Body and Accessories 🢒 Stationary Windows 🢒 Defogger System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the ignition switch OFF.
  2. Turn the ignition switch ON.
    • The defogger ON indictor is off.
    • The defoggers are off.

Rear Window Defogger Always On

2
  1. Press and release the defogger switch one time.
  2. Wait approximately 12 minutes.
    • The defogger ON indicator lights.
    • The defoggers come on.
    • The defogger ON indicator and the defogger turn off after approximately 10 minutes.

3
  1. Press and release the defogger switch one time.
  2. Wait approximately 7 minutes.
    • The defogger ON indicator comes on.
    • The defogger come on.
    • The defogger ON indicator and the defoggers turn off after approximately 5 minutes.

4
  1. Press and release the defogger switch one time.
  2. Wait approximately 15 seconds.
  3. Press and release the defogger switch a second time.
    • The defogger ON indicator comes on.
    • The defogger come on.
    •  The defogger ON indicator and the defogger turn off immediately when the switch is pressed the second time.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.