why wont my 300 hold a charge. battery and altenater are good


Asked by Sep 29, 2013 at 08:22 PM about the Chrysler 300

Question type: General

10 Answers

Tom Demyan

What do you mean by "good"? Is the battery new or old, what is the voltage? You might have a drain on the battery if you keep losing the charge.

7 out of 7 people think this is helpful.

Battery is new.took it to have it checked and its good.also had altenater checked , also good

8 out of 8 people think this is helpful.

Did you do a battery draw test in the vehicle?

4 out of 4 people think this is helpful.

Dont know how


OK make sure your battery is fully charged, roll down a window, check for any lights that are on ie dome, trunk, glove box, brake, etc. disconnect one terminal, put a test light between the battery post and cable clamp, if the light did not turn on then you don't have a battery draw, if it does then you do, if you do the very first thing to do is disconnect the alternator's electrical, it may have a bad diode even though it tested good, if the light went out when you disconnected the alternator then that is as far as you need to go, replace your alternator, if not then you will have to start removing the fuses on at a time until the light goes out, remember to take out the dome light circuit first, take note as to what fuse went where when you do this, when you find the fuse that puts out the light then you have to find out what piece of equipment is drawing power on that circuit, after that is fixed then start putting back fuses and watch for the light, if it stays off then problem is fixed, if it turns back on then check that circuit and so on, once you have got all off the draws repaired and are down to dome light circuit you may want to remove all of the bulbs to test that circuit, once you have done that then hold the battery cable end onto the post for about 15 seconds then recheck for a draw if there is no light then draws are fixed. Note today's vehicles have what they call parasitic loads, depending on the wattage of your test light they could show up and cause the light to glow , not a bright light just a dim glow this draw is normal. I hope this has helped you with your problem, battery draws can be really tough to find a lot of times, then sometimes you find it right away and it is something simple like a glove box light switch gone bad, so don't get discouraged.

5 out of 5 people think this is helpful.
Best Answer

Good call tennishoes

Nun'z Gilman

I have a new alternator and battery but my car starts up then dies off. What is wrong?

4 out of 4 people think this is helpful.
Nun'z Gilman

I had changed cataylic converter, did a flowmaster, changed all sensors and fuel pump so i dont know whats the issue

1 out of 1 people think this is helpful.
Nun'z Gilman

I have a 2006 chrysler 300..

1 out of 1 people think this is helpful.
Angela Lozano

Hi I wanna now what happen to your 300 Chrysler nun'z my car is the same

1 out of 1 people think this is helpful.

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