Defogger Switch Test: Prelude

Remove heater control panel. Using a DVOM, ensure continuity exists between terminals No. 11 and 14 when control switch is depressed. See Fig 3. Continuity should exist between terminals No. 12 and 16 at all times. If continuity is not as specified, replace defogger switch.

Fig 1: Testing Defogger Switch (Civic)

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Fig 2: Testing Defogger Switch (CR-V)

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Fig 3: Testing Defogger Switch (Prelude)

Courtesy of AMERICAN HONDA MOTOR CO., INC.