Test 1: All Power Windows Inoperative

Turn ignition off. Disconnect power windows main switch. Turn ignition on. Measure voltage between power window main switch connector K-502, and terminal No. 2 (Light Blue/Black), harness side and ground. See Figure. If voltage is greater than 10 volts, go to next step. If voltage is less than 10 volts, go to step 3.
Turn ignition off. Measure resistance between power window main switch connector K-502, terminal No. 5 (Black), harness side and ground. If resistance is less than 5 ohms, install a new power window main switch. See MASTER WINDOW SWITCH under REMOVAL & INSTALLATION. After repair, retest system operation. If resistance is more than 5 ohms, repair Black wire. Retest system operation.
Turn ignition off. Disconnect power window relay. Test power window relay. See POWER WINDOW RELAY under COMPONENT TESTS. If power window relay is functioning properly, repair suspect supply circuits. Retest system operation. If power window relay is not functioning properly, install a new power window relay. Retest system operation.