ELECTRICAL PROBLEM

  • Tiny
  • Anonymous
  • 1966 Chrysler Newport
  • 90,000 miles

ELECTRICAL PROBLEM. BATTERY AND ALLTINATOR, AS WELL AS RELAY SWITH ARE ALL NEW. YOU CAN DRIVE, BUT ONCE YOU TIRN ON HEADLIGHTS, EVERYTHING GO'S, YOU LOSE POWER? IM STUMPED AS TO WHAT IT MIGHT BE.

Friday, November 9th, 2012 AT 5:58 PM

2 Answers

  • Tiny
  • JDL
  • Expert
  • 16,290 posts

If there is a wiring circuit issue, replacing parts won't fix it. Use a digital multimeter across battery posts, everything off. Around 12.6 volts is a fully charged battery. Start the engine, take second reading across battery posts, engine running, the second reading should be higher than the first, if charging system is working.

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Friday, November 9th, 2012 AT 7:09 PM
  • Tiny
  • JDL
  • Expert
  • 16,290 posts

I did find some alternator specs, 1966 chrysler alternator. Engine rpm@1250, alternator output 13.3--14.3 volts. Check in both places across battery posts and alternator bat terminal. What about external voltage regulator?

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Friday, November 9th, 2012 AT 7:33 PM

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