ALL LIGHTS AMP SIGNALS WORK FINE BUT ON THE DASH...

  • Tiny
  • carlsmiller
  • 2001 Isuzu NPR
  • 290,000 miles

All lights & signals work fine, but on the dash; the brake, brake booster, abs and battery lights remain on. The heat/air does not blow when turned on, and the radio does not work. The battery seems to be strong and they're not that old (2 months). The smaller 2 prong fuses are all ok. All the large fuses are good (that I can find), the alt. Is charging, al the lights will go out and everything works fine if I am going 50-55 mph or race the eng. Fairly high. Wat could it be?

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Monday, November 19th, 2012 AT 5:18 PM

4 Replies

  • Tiny
  • fakhir
  • Member

Check out the dynemo, is that working good?

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Monday, November 19th, 2012 AT 5:25 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,997 posts

Did you perform a charging test on the alternator and what are the readings?

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Monday, November 19th, 2012 AT 9:05 PM
  • Tiny
  • Mechanic7
  • Member

14.2v 40amps 60amps under load.

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Wednesday, July 30th, 2014 AT 3:49 PM
  • Tiny
  • Mechanic7
  • Member

I am replying because I have the exact same problem all except my radio works.

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Wednesday, July 30th, 2014 AT 3:50 PM

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