At a loss replaced alternator and its still not charging the battery
04-26-2006, 11:55 AM
#1
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At a loss replaced alternator and its still not charging the battery
does anyone have the wiring diagram from the alternator to the battery and or the charging system. The new was verified to be good. Anyone have any ideas...........
04-26-2006, 01:43 PM
#7
proper charge diag
1. load test battery - it is not enough to simply measure static voltage of a battery. A battery that says 12.5v just sitting there can fall on its face under a real load test.
A BAD BATTERY CAN THROW OFF ALL OTHER CHARGE TESTS
2. check charge voltage across the battery engine running (rev engine too).
3. check voltage drop alt (+) to battery (+)
wiggle test cable as well
4. check voltage drop (-) battery to ground
wiggle negative cable as well.
Alternator cable failure is rare (so is alternator failure). The battery is usually the culprit in these cars.
A BAD BATTERY CAN THROW OFF ALL OTHER CHARGE TESTS
2. check charge voltage across the battery engine running (rev engine too).
3. check voltage drop alt (+) to battery (+)
wiggle test cable as well
4. check voltage drop (-) battery to ground
wiggle negative cable as well.
Alternator cable failure is rare (so is alternator failure). The battery is usually the culprit in these cars.
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