Main Relay Inspection

Disconnect negative cable at battery.
Remove main relay (1) from relay box (2).

Fig 1: Removing Main Relay From Relay Box
Courtesy of SUZUKI OF AMERICA CORP.
Check for resistance between each two terminals as in table below. If check results are as specified, proceed to next operation check. If not, replace main relay.
Main relay resistance

Between "A" and "B": Infinity (oo)

Between "C" and "D": 79 - 95 ohm at 20°C (68°F)

Fig 2: Checking Resistance Between Relay Terminals (Power Not Applied)
Courtesy of SUZUKI OF AMERICA CORP.
Check for resistance between terminals "A" and "B" when battery is connected to terminals "C" and "D". If check result is not specified, replace main relay.
Main relay resistance with main relay turned on Less than 1 ohm

Fig 3: Checking Resistance Between Relay Terminals (Power Applied)
Courtesy of SUZUKI OF AMERICA CORP.