Ranger 4WD V6-3.0L VIN U (1997)
Power Seat Switch: Description and Operation
The seat back control switch performs three functions.
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First, it turns the front seat back pad adjusting pump on.
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Second, it is a one-way check valve for air passage to the front seat back pad adjuster. Once the bag is inflated and the seat back control switch is
left to its normal mode, the check valve closes and prevents air in the bag from leaking out.
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Third, in the deflate mode, it opens the check valve, releasing the air deflating the front seat back pad adjuster. In this mode the front seat back pad
adjusting pump does not operate.
The longer nipple on the seat back control switch (located at the center of the seat regulator control switch) should always be connected to the front seat
back pad adjusting hose leading to the front seat back pad adjuster. The shorter nipple on the seat back control switch connects to the air pump outlet. If
this order is reversed, the front seat back pad adjuster will not hold air pressure.
