Question about Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: wont start
I'm sure you checked the terminals were clean and tight.
From your description, the symptoms still point to the battery(s).
Extreme temperatures can have a negative effect on them.
Question: Do you have a dual battery setup? You mentioned Batteries.
While a battery may read +12VDC on a volt meter, it's ability to deliver enough Cold Cranking Amps to turn the engine has been reduced. This is sometimes referred to as a 'Surface Charge'. It has the voltage of a fully charged battery, but not the performance of one.
But no one likes guessing games. Here's how to either confirm or rule out the battery as a problem.
It's called 'Load Test'. It tests the voltage under a simulated load, like turning the engine.
Most battery or auto parts stores will do the test for you for free.
Even though it works during the day after you get it jumped, the Load Test would still read as 'marginal' rather than 'good' if there is a problem.
At the same time, have them test the voltage while the engine is running to check the alternators charging capacity.
If the battery fails the load test, the acid level may be low. I don't know the type you have. If it's not the sealed type, it may be fixable. Otherwise, replacement would be necessary.
At this point I've stacked up three or four 'If's'. Let's see what the Load Test says. Get back to me with the results, we can proceed from there.
Posted on Dec 21, 2008
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