I've replaced the starter, cylinoid, battery and system still fails to start after short trips, and the battery shows power over the median gage. Why isn't the battery staying charged. On occasion a jump start would work and bring battery level back up. The last time this effort failed. Is there a bad connection to systems?
engine system still fails to start on 1995 Ford Explorer
You may have a parasitic draw on the system. A parasitic draw is when you turn the car off some component is still drawing electricity. Another possibility is the ignition switch may be malfunctioning.