Test No. 5

Remove power window sub-switch from door panel. Test power window sub-switch. See SUB-SWITCH under POWER WINDOW SWITCH under COMPONENT TESTS. If power window sub-switch is okay, go to next step. If power window sub-switch is bad, replace switch and retest system.
Check for continuity in Yellow wire between power window sub-switch and in-line connector C-19. In-line connector C-19 is located above junction block. See Fig 1 . Ensure continuity exists through each in-line connector. See WIRING DIAGRAMS . Repair Yellow wire as necessary and retest system. If wiring is okay, problem is intermittent. Check all connections and retest system.

Fig 1: Locating In-Line Connector C-19

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.