A7: Check Master Window Regulator Control Switch

Turn ignition switch off.
Remove the master window regulator control switch. Leave the electrical connector connected.
Turn ignition switch to RUN/ACC.
Using Rotunda Digital Volt-Ohmmeter 017-00407 or equivalent, check for correct voltage at the master window regulator control switch while moving the window regulator control switch. See Fig 1 .

Fig 1: Testing Master Switch Voltages
Courtesy of FORD MOTOR CO.