Alternator not charging battery

1978 FORD LTD
80,000 MILES • V8 • 2WD • AUTOMATIC
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DANIEL JAY
  • MEMBER
  • 1 POST
New battery, new alternater, new voltage regulator, car cranks and runs perfect for about 30 min battrry goes dead, put on the lights car kills hold the brakes the car kills
Mar 27, 2017 at 9:27 AM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
Start by measuring the battery voltage, first with the engine off, then with it running. Do that after charging the battery at a slow rate for at least an hour. Tell me what you find.
Mar 27, 2017 at 3:11 PM
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