Defogger Relay Test

Unplug defogger relay from dash fuse block. Continuity should not exist between terminals "A" and "B". See Fig 1 . Apply battery voltage to terminal "C". Connect terminal "D" to ground. Continuity should exist between terminals "A" and "B".

Fig 1: Identifying Relay Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.