Swift GA L4-1298cc 1.3L SOHC MFI (2001)
Wiper Relay: Description and Operation
INTERMITTENT WIPER RELAY CIRCUIT
When the wiper switch is set to the intermittent position with the ignition switch ON (the condenser is charged at this time), current from the battery
flows through the Y/BI wire, generates magnetic force in the coil in the relay and causes the switch in the relay to turn ON. Then current is transmitted in
the sequence of Y/BI, BI/W, wiper switch and BI, and causes the wiper motor to rotate (meanwhile, the condenser discharges). By the time the wiper
motor makes one rotation and the contact plate in the motor comes to the automatic stop position P(1), the condenser in the relay has finished
discharging (no magnetic force in the coil in the relay). Then the switch in the relay turns OFF and the wiper stops.
They remain that way until the condenser is fully charged. As soon as the condenser begins discharging after being fully charged, magnetic force
generated in the coil in the relay causes the switch to turn ON. As described above, intermittent operation of the wiper motor is controlled by charging
and discharging of the condenser.