Where is the windshield wiper governor on a 1989 Ford F-150?

The 1989 Ford F-150 doesn't have a separate component specifically called a "windshield wiper governor" in the same way some older vehicles might. The speed and intermittent wiping function are controlled by a combination of the wiper motor itself, the wiper switch (which contains the intermittent timer circuitry), and possibly a relay. There's no single, identifiable "governor" part.

To troubleshoot wiper speed issues, you'd need to examine:

* The wiper switch: This is the most likely culprit for intermittent problems. It's located on the steering column.

* The wiper motor: Located under the hood, usually beneath the cowl (the area where the windshield meets the hood).

* The wiper motor relay (if equipped): This is an electrical switch that controls the power to the motor. Its location varies by truck model; you might find it in the under-hood fuse box, or in the cab's fuse panel.

The intermittent wiping functionality is likely controlled by a resistor and capacitor circuit *within* the wiper switch itself, not a separate governor. If the intermittent function is malfunctioning, the switch is almost certainly the problem.