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1991 Mercury Cougar Charging
Charging
What is your question?
Why isn't my mercury keeping a charge? have changed the postive batter cable and checked all lights to make sure notheing is on, What can you suggest to do next
Battery could be too old. You can still have a draw draining a good battery without lights being on. You need to have a shop do a starting and charging system test and check for a draw.
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Agree with Ron;
Also - of course, once you have a known good battery, a charging system test can be performed. You could have an alternator or voltage regulator issue.