1964 Other Pontiac Models headlights dim when directional si

1964 PONTIAC
136,000 MILES • V8 • 2WD • MANUAL
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CARABELP
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  • 1 POST
I first noticed the headlights dimming with the directional signal when it flashes. But then I noticed that the headlights dim when any electrical thing is energized: heater fan, brake lights, wiper...etc. When the car is running the voltage at the battery is 12.8 when the car is not running it is 12 volts. The voltage at the alternator is 15 volts. The car has a mechancal voltage regulator and I am starting to investigate if it is putting out enough voltage.
Jul 19, 2008 at 5:48 AM
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BUDDYCRAIGG
  • ✓ASE Certified Mechanic
  • 2,262 POSTS
  • ASE Certified Mechanic
If you are reading 15 volts at the alt. but only 12.8 volts at the battery. There must be a problem with the wiring between the two.
Dec 7, 2008 at 6:56 PM
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