Suzuki Wagon R Manual page 82

A/C BLOWER FAN RELAY
INSPECTION
1) Disconnect negative cable at battery.
2) Remove A/C blower fan relay (1) from vehicle.
3) Check that there is no continuity between terminal "c" and "d".
If there is continuity, replace relay.
4) Connect battery positive (+) terminal to terminal "b" and connect
battery negative terminal to terminal "a".
Check continuity between terminal "c" and "d".
If there is no continuity when relay is connected to the battery,
replace relay.
AIR CONDITIONING (OPTIONAL) 1B-23