Master Switch

With the switch in the NEUTRAL position, there should be continuity between terminals 1, 3, 4, 5 and 6. See Fig 1 .
When the ribbed portions of the switch rocker knobs are pushed (to close the windows), there should be continuity between terminals 1, 2, and 3 and terminals 4, 5 and 6.
When the flat portions of the switch rocker knobs are pushed (to open the windows), there should be continuity between terminals 1, 3 and 5 and terminals 2, 4 and 6.
If the switch assembly does not test as outlined, replace the switch.

Fig 1: Identifying Master Power Window Switch Terminals

Courtesy of FORD MOTOR CO.