Can you check alternator without rmoving it?

Tiny
ANONYMOUS
  • 1998 CHEVROLET S-10
  • 205,000 MILES

Can you check alternator without rmoving it?

Tuesday, March 19th, 2013 AT 6:57 PM

1 Reply

Tiny
JDL
  • EXPERT
  • 16,281 POSTS

Use a digital multimeter. Place leads across the battery posts, everything off. The generic spec for a full charge is around 12.6 volts. If the battery is down, take it off and get it charged. Cant do much testing if the battery is down. Then start vehicle, take same reading across the battery posts, again. The second reading should be higher than 12.6volts if charging system is working. If not charging, There could be a wiring problem to or from the alternator?

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Tuesday, March 19th, 2013 AT 8:33 PM

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