Rear Window Defogger Relay Inspection

Disconnect negative (-) cable from battery.
Remove rear window defogger relay (1) from fuse / relay box (2).

Fig 1: Identifying Rear Window Defogger Relay And Fuse/Relay Box
Courtesy of SUZUKI OF AMERICA CORP.
Check that there is no continuity between terminal "c" and "d". If there is continuity, replace relay.
Connect that there is continuity between terminals "c" and "d" when a 12 V battery is connected to terminals "a" and "b".
If malfunction is found, replace it with a new one.

Fig 2: Checking Continuity Between Terminals
Courtesy of SUZUKI OF AMERICA CORP.