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Old 10-27-2015, 01:47 AM   #6
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 45,201
 

2003 L-Series 3.0L Sedan
Default Re: Dying starter or battery/circuit issue?

Your descriptions seems to be more about main power issues than starter problems. That 30 lb battery shifting a little might not be of any concern in warm weather when battery cables flex but they won't flex as well in cold temperatures. Stiff battery cables and a loose battery mount is a recipe for both battery cables to loosen up from the battery shifting around and breaking one of both battery side terminals - a major cause of acid damage as battery acid leaches into cables to courier and dissolve copper. If both cables are corroded, this adds to losing power from intermittent main power disconnects. A warm solution of baking soda and water with a toothbrush dissolves the dry powdery deposits and neutralizes it as it reacts by bubbling. A water rinse cleans up everything. If corrosion is severe, copper wires may be eaten away from this battery acid over the years. It won't be seen unless the heavy insulation is peeled back to examine the extent of corrosion. Loss of copper results in the crimped connection failing, allowing loose connections.

Examine both battery cable connections carefully, clean them off necessary and ensure the battery hold down configuration is secured to prevent this battery from shifting as you go into cold weather. It won't be fun when temps drop below freezing and power loss fears it ugly head again when you have time to prevent it.

Securing the battery from weight shifting and better connections goes as long way to keeping the battery charged as the alternator has less loads with a good electrical connection. This also depends on a tight drive belt going into winter to prevent a slipping belt. If the battery is lead than a few years old, in should go thru this winter without problems.
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