Thread: Battery drain
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Old 01-18-2009, 11:38 PM   #16
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 41,190
 

2003 L-Series 3.0L Sedan
Default Re: Battery drain

The ignition switch issue occurs in very cold weather with two scenarios; 1)no sound from the starter and the security light comes on, disabling the starter circuit, 2) no sound from the starter.

Starting all over again and this time not assuming anything; measure the battery voltage - at least 12.5v engine off, 13.5v+ engine idling, 14.3v+ above idling. Was the battery 'load' tested, that is placed under a high electrical load to duplicate a large current draw similar to a starter that draws 50-150+ amps of current for over 30-seconds? At the end of this test the battery voltage is measured again to see how it holds up to draining power and its ability to recover. Who did the battery/alternator check? If the battery measures below 12.5v you have the problem originating at the battery.

Next are the battery cables; have you actually removed them, negative cable first then positive cable, for a visual inspection of any corrosion in and under the RED positive cable? Not taking the time to do this thoroughly is making a big assumption if running down the wrong path and it turns out to be cable related. Be absolutely sure its neither the battery nor the battery cables and their connections to ground and the starter. Don't assume anything. Its your car and you ultimately are responsible for any misinterpretations and assumptions as well as describing incorrect assessments, for anyone to provide assistance. Carefully going over the basics like the battery and battery cables with the aid of free battery testing from Autozone or someplace similar will help isolate and eliminate mistakes. Sometimes another pair of eyes may point out something you missed.

An intermittent starting problem will usually begin with the battery for supplying power, the battery cables for distributing the battery power, and the starting circuit that seems to be intermittent. You need to figure out if this is a battery problem, a battery cable(s) problem, the connections related to these two parts as the primary circuits, and/or if its the secondary circuit where the ignition switch uses the electrical system to start the engine. Either you have the ability to follow this or should consider turning to a garage or Saturn for professional help. Having the wiring diagrams and understanding electrical distribution for power may help here.

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