Electrical issues

1990 HONDA ACCORD
202,000 MILES • 4 CYL • FWD • AUTOMATIC
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UOU
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  • 1 POST
Put brand new battery and alternator in because battery light came on off for a couple of days and back on. i tested continuity from alternator to battery nothing. it is not charging battery no fuses are blown and i m at a lose here. can you help?
Feb 16, 2017 at 7:16 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,393 POSTS
Continuity tests are very inaccurate in high-current circuits. All you need is one strand remaining and 99 broken to get a good reading, but you will only be able to pass a tiny amount of current. If "nothing" means you found infinite resistance, there is a break in the circuit running from the generator's output terminal back to the battery. There is a large bolted-in fuse for that circuit.

A better test is to measure voltage in the circuit. You should find full battery voltage on the generator's output terminal all the time. If that is missing, there is a break in that wire including that fuse.
Feb 16, 2017 at 7:37 AM
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