D250 3/4 Ton Pickup 2WD V8-318 5.2L VIN Y FI (1988)
Power Window Switch: Testing and Inspection
Power Window Switch Test
1. Remove the left power window switch from the trim panel and remove the wiring harness from the back of the switch. Connect jumper wires as
shown to the left switch harness forcing the windows to operate in each direction.
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If the window motors operate properly, the left switch is defective.
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If the left window motor does not operate properly, the window motor or wiring may be defective.
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If the right window motor does not operate properly, go to step 2.
2. Remove the right power window switch from the trim panel and remove the wiring harness from the back of the switch. Connect the jumper wires
to the right switch harness as shown and test using jumper wires at the left door harness.
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If the right window motor operates properly, the right window switch is defective.
^
If the right window motor does not operate properly, the right window motor or wiring may be defective.
