Battery always dead after sitting for a couple hours, car has two batteries, can second battery if bad drain main battery? Cleaned and replaced main battery. cables, while engine running removed positive cable engine still runs, tested alternator its good, stumped here
2001 Lincolon Towncar Limo
can second battery if bad drain main battery? YES
A shorted battery that is connected will be a short in the entire circuit. A short is a short and will drain everything given time.
Replace the Second battery and you should be good. This is assuming you haven’t recently installed any new wiring for a sound system or security system, etc.
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