Body Control ECU

Apply water to windshield before operating wipers. Turn wiper switch to INT position. If wipers operate in INT position, body control ECU is operating properly. Check open door indicator light. See OPEN DOOR INDICATOR LIGHT . If wipers do not operate in INT position, inspect wiper/washer system. See WIPER/WASHER SYSTEMS - LS400 article. Repair or replace components as necessary. If wiper/washer system is okay, replace body ECU.