Tail Light Relay, Headlight Relay Inspection

Remove tail light relay (1), headlight low beam relay (2) and/or headlight high beam relay (3).

Fig 1: Identifying Tail Light Relay
Courtesy of SUZUKI OF AMERICA CORP.
Check that there is no continuity between terminal "3" and "4". If there is continuity, replace relay.
Connect battery positive (+) terminal to terminal "2" of relay and battery negative (-) terminal to terminal "1" of relay.
Check continuity between terminal "3" and "4". If there is no continuity when relay is connected to the battery, replace relay.

Fig 2: Checking Continuity Between Terminal "3" & "4"
Courtesy of SUZUKI OF AMERICA CORP.