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, Headlight Low And High Beam 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 And 4 Of Tail Light And Headlight Relay
Courtesy of SUZUKI OF AMERICA CORP.