One Window Is Inoperative From Individual Switch, Operates From Master Switch

Turn ignition switch to RUN position. Using a test light, backprobe between ground and Dark Blue wire (Brown wire on Bonneville) at inoperative window switch connector. If test light is on, go to next step. If test light is off, repair open in Dark Blue wire between inoperative window switch and master switch. On Bonneville, repair open Brown wire between inoperative window switch and splice 501 (located in driver's door near master switch connector).
Check inoperative window switch for poor connections. Repair as necessary. If connection is okay, replace inoperative window switch.