Whenever the ignition switch is in the ON position or the START position, battery voltage flows through the WIPER fuse to the following components:

When the front wiper/washer switch is pulled back (closed), battery voltage is applied to the front washer pump. The front washer pump is permanently grounded at G102 and operates as long as the front wiper/washer switch is held back. The windshield wipers also operate at LOW speed as long as the front wiper/washer switch is held back.

When the front wiper/washer switch is in the LO position, battery voltage is applied through the WIPER fuse and the LOW contacts of the front wiper/washer switch to the low side of the front wiper motor. The motor operates at low speed as long as the switch remains in the LO position.

When the front wiper/washer switch is in the HI position, battery voltage is applied through the WIPER fuse and the HIGH contacts of the front wiper/washer switch to the high side of the front wiper motor. The motor operates at high speed as long as the switch remains in the HI position.

When the front wiper/washer switch in the INT position, battery voltage is applied through the WIPER fuse to the following components in the intermittent controller:

The condenser charges to battery voltage and the relay energizes as soon as power is applied. When the switch in the energized relay closes, voltage is applied through the BLU wire to the front wiper motor LOW side. The wipers begin to operate at LOW speed.

By the time the wiper motor makes 1  complete rotation, and the front wiper motor pawl and switch has engaged, the condenser in the intermittent controller has discharged. The discharge in the condenser causes the intermittent controller relay coil to de-energize, and the switch in the relay to open. The current flow to the wipers is then cut off until the condenser is recharged. Intermittent wiper operation occurs through the charging and discharging of the intermittent controller condenser.