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On my '91 F150 the wipers work fine in intermittent mode and on low, but on high they sometimes work fine and sometimes just stop working.
When they stop they seem to just freeze up (i.e. they don't park... they just stop in the middle of the windshield). When this happens I can turn them off and back on low an they'll start working again.
Does anybody know if I should suspect the wiper switch, the motor, or the intermittent module? Are there any tests I can run to isolate which one is going bad?
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.