why does the car(1978 Ranchero) run perfect until you turn headlights OFF?

Asked by nicke0512 Oct 08, 2012 at 08:51 PM about the 1978 Ford Ranchero

Question type: Maintenance & Repair

Car has a 460 in it from a 75 ranchero, will start and run perfect with the headlights ON,the second you turn them OFF, the car chokes and stalls out all together

1 Answer
61,165

Andrew answered 12 years ago

Check alternator output. Maybe the lights are taking up some extra juice? Or maybe someone wired something to the headlights as a quick fix? Obviously under normal conditions the headlights shouldnt affect engine at all.

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