Dead battery not battery or starter

Asked by Oct 23, 2019 at 01:15 AM about the 2003 Ford Explorer Limited V8 AWD

Question type: Maintenance & Repair

Every time I park and turn it off and go to start
again it won't start I have to either jump start or
put it on battery charger it isn't the starter or the
battery I've put 2 new batteries in it n it has only
continued.  

5 Answers

5

Alternator? Test your alternator by taking the battery out after you have the car started. If the car dies when you disconnect it it's your alternator

76,335

Disconnecting a car's battery while the engine is running is a bad idea. The battery puts out around 12.6 volts and actually regulates voltage to the car's electrical systems. A good alternator pushes out over 14 volts. By disconnecting the battery in a running car, you produce spikes in voltage from the alternator that can send more than 14 volts to all the car's sensitive electronics, including every semiconductor and the ECU and damage them. This can be a VERY costly mistake. Just go to a car parts store and have the alternator checked, probably free.

1 people found this helpful.
13,055

You have something draining your battery like an interior light or other minor electrical component. Check all obvious things like glove box lights, courtesy lights, etc. If nothing is found, connect an amp meter in series with the positive battery lead. I suspect it will show the drain by indicating a positive amp reading with the car OFF. Then start pulling fuses until the current stops - that fuse will tell you what circuit is the guilty party. Next, investigate components on that circuit to determine the cause and fix it.

13,055

It could also be your alternator as POSsubaru93 said. If it has failed, driving the car will also drain the battery but you will not get very far before it dies. That is why I suspect the parasitic drain.

1 people found this helpful.

Thank you guys i appreciate your answers and will try what you've suggested.

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