what could be the reason my 1999 ford explorer want hold a charge after buying a new alternator and same battery but autozone say the battery good

Asked by Nov 24, 2013 at 09:54 AM about the 1999 Ford Explorer 4 Dr XL 4WD SUV

Question type: Maintenance & Repair

3 Answers

71,875

If your battery is over 4 years old, I'd replace it. Do you drive the vehicle regularly? If it sits for long periods, say a week or two, the draw from the vehicle's computers will kill the battery. Especially if it's a few years old. If this is not the case, check the 3way plug at the alternator. These were notorious for failure. Also check that something like a bad door jam switch is causing the interior lights to stay on or any accessories that are staying on after you shut off the vehicle. HTH. -Jim

4 of 4 people found this helpful.
20,860

My daughter's 99 explorer had the same problem. Battery and alternator both good. finally traced it down to a stuck switch on the drivers door that allowed the interior lights to stay on when door was closed. The switch is inside the door so the panel has to be removed. The space is tight and removal is difficult. Soaked the switch in place with electrical contact cleaner and WD 40 and it freed itself up. Try that first if the lights stay on. As JS said, 3.5 to 4 years is about all you're going to get out of a battery. The weakness will show up with the forst cold snap. Also check all connections on a 15 year old vehicle for corrosion.

3 of 3 people found this helpful.
60

The inside lights go off when door is closed

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