Have to jump start car even though battery was checked good condition
If the car will not start with the battery as fitted, but will start fine with a jump start (which is just substituting power from another battery) then clearly the battery in the vehicle is faulty, dead or discharged. I am assuming of course that the cables are properly attached to the battery as fitted and the battery terminals are clean.
First - remove the cables from the battery terminals and give the battery terminals (and cable contacts) a good clean. Then charge the battery even if you think it is ok. Then re-connect the cables to the battery terminals. If the car will not start on that battery then it is either dead or faulty. If the car will start fine with a jump start (as you have indicated it definitely will) then you will need a new battery. If the battery fitted to the car is about 3 or more years old then you can anticipate problems with it especially if it has been fully discharged a few times or if it is one of the low price models.
(Some poor quality batteries on the market will die with 2 years of use. The warranty period on the battery is a fair indicator of the quality of battery you have. Many lower priced models are just 12 months which is the manufacturer saying to you that they have such little confidence in the longevity of the battery that they will only guarantee it will perform for 12 months.)
Dec 22, 2009 |
1997 Mercury Sable