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Battery slowly losing charge in 2002 Honda Accord

I can't figure out why my battery is slowly dying. I replaced the battery about 8 months ago. A couple of times when I have slowed down to complete stop my car has died, but starts back up slowly. I have noticed it starts slow and also when when I turn my heat on my car nearly dies. I'm not sure what the problem is? Can someone please help me figure out what is going on?

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Jay, that does not sound like your battery. Once your car starts, all the power distribution should come from your alternator. So, if it "when I have slowed down to complete stop my car has died" and " when I turn my heat on my car nearly dies" leads me to believe that you probably have either some alternator issues or some wiring that is corroded. Check the wires and connectors on your alternator and measure the output of the alternator. Hope this helps, good luck.


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I also have a 2002 Honda Accord that is having a very weird issue. They keep telling me it is my battery but I do not agree. I have owned my car for 2 1/2 years and during the summer it is great but as soon as the temperature drops to 40 i have to Jump my car to start it. i have had 3 mechanics run test and all have found nothing wrong. I do my oil every 3,000 miles or less. i did a full 85,000 mile tune up in September, replaced timing belts and wires, etc... i have missed work and am very frustrated. PLEASE if anyone has any ideas let me know.




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There are two steps I would take to troubleshoot this. First if you haven't already, check to see if this is a known problem, Google it a bit.

After that if your on your own "oldturkey03" has you on the right track. With the car running, the voltage at the battery should be 14VDC or a bit more, this is most easily checked with a multimeter (if you don't have, or know someone with a voltage meter, try going to your local autoparts store, they may have one to test it for you).

If you do have 14VDC while running (12VDC when car is off), then check your battery cables for corrosion, are they tight enough? Also follow the cables from the battery to whatever they connect to next, the negative (Black) cable will probably bolt to the engine, with several other wires bolted to the same place, make sure it's tight.

From there you can start looking at all the junction points the Positive cable makes, all the way back to the fuse block. This will include alternator and starter connections.

The Negative cables need to be checked as well, after the battery they can be referred to as "Ground" cables.

A quick way to check if your alternator is working is to start the car and simply remove the Positive cable, the car should run with just the alternator. If not, check connections/corrosion then take it in to be tested.

Tracking down electrical problems can be time consuming but I hope this helps!




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Jay さん、ありがとうございました!

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