2 "ANTILOCK" warning light does not come on for 3 seconds after ignition switch on. Disconnect connector from actuator, and ground the terminal W of the wire harness side connector. (Ignition switch on) Does warning light come on? NO Bulb burned out or open circuit in wire harness between warning light and actuator terminal W. YES Disconnect connectors from computer and actuator, and ground terminal W of computer wire harness side connector. (Ignition switch on) Does warning light come on? NO Open circuit in wire harness between computer terminal W and warning light. YES With ignition switch off, disconnect actuator connector, and check continuity between terminal W and AST on actuator side. Reverse tester leads and check again. Is there one way continuity between terminals? NO Short circuit in actuator inside diode. YES HINT: If the diode is short-circuited, a malfunction at computer terminal W will occur. When inspecting the terminal, connect the W wire to connector and disconnect actuator connector. Then turn the ignition switch on, and check that the warning light goes on. If it does, the computer terminal is OK. Faulty computer.