Question about 2005 Chrysler 300
2001 300m, new battery 7/08, new starter 3/09, have been towed 4x in the last year, car is DEAD, will not hold a charge, battery cables have been replaced and tightened several times...help!
You have indicated the battery cables have been changed - but what about the alternator??
Your vehicle runs off the alternator - however - if it is not working properly - it is not charging the battery.
With the car off - the voltage should read 8.5VDC to 12VDC.
This is acceptable for starting your vehicle. Anything under 8.5V, and your car will not start.
While running - the battery should measure approximately 14.4VDC - anything under 14, and there is a problem with your alternator.
Have it LOAD tested at your local parts shop. This will tell for certain if the alternator is working properly.
Secondly - if all checks out OK, you may have a voltage gremlin :D
This is some electronic equipment, (relay, broken wire etc).... that is allowing current to go to it while the vehicle is off... and draining your battery. This will take alot of time, however you can pull certain fuses like the radio and defroster to see if the drainage problem subsides... then concentrate on sniffing down that gremlin!
Lastly - if all routes have not come to a conclusion - your BCM or ECM (computer) may be at fault.
If you are driving somewhere from a cold start - and after getting there you are no longer able to start - there may be a cold or cracked solder joint on the main board of the module. In that case replacement is your only option - as it is an enclosed unit, and not separately serviceable.
Was the battery replaced beacuse of this problem? If not - if not - it is not uncommon for new batteries to develop dry cells - rendering the alternator charge useless. You may want to have that LOAD tested at the same time the alternator is done to eliminate that possibility.
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Posted on Jul 01, 2009
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Posted on Jan 02, 2017
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