Take your batteries and get them load tested, your seeing a surface charge, the batteries show good voltage until loaded, check the voltage and turn the headlights on, you should see the same thing,
Pull the batteries out, charge them, then most auto parts stores will do a free load test.
Surface charge, a battery will build a charge just sitting there not being used, but has no amps to it
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Mike & Becky
2005 Crescendo 8356
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