what would cause this

Asked by Dec 15, 2014 at 10:55 PM about the Ford F-150

Question type: Maintenance & Repair

here goes; 95 f150 4x4.  if you turn on the lights,the running lights will not work. if you turn it to running lights only, they work fine. signals and brake lites are fine. in other words,you have to choose between headlights or running lites.  switch is new so are bulbs and fuses

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If the lights do not work as before and the switch is new check a wiring diagram and see if there is a relay somewhere which may be defective.

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