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1988 gmc jimmy. What would make my headlights cut on and off?

(1990 GMC Jimmy)
in El Paso, TX on September 25, 2015
The headlights cut on and off after running for about ten minutes thought it was the alternator so replaced that and the still do it what could it be?
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Popular Answer
on September 25, 2015
take the headlight switch out.check the connector and the pins on the back of the switch,maybe burnt.
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