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The house battery in my fiver was overcharged, boiled dry as we were traveling. The fiver is a '87 Jayco designer series. My pull vehicle is a 2000 Ford F-250 with the power stroke in it. What could have caused the battery to be overcharged while being pulled. I have no manuyls for this trailer because I bought it used and the gentleman that I bought it from never had them either. Any information would be greatly appreciated. please respond to my e-mail address as listed above. Thank you in advance.
This might be your problem. Most alternators have a sense line that detects the voltage at the car battery and adjusts the alternator output to give about 13.6 volts to the battery. My southwind had a poor connection between the alternator output and the battery. The house batteries (in your case the trailer batteries) were connected through an isolator by a line directly from the alternator. Because of the high resistance of the line to the car battery, the alternator was pumping out something above 15 volts. The car battery was fine, as it saw 13.6 volts after the resistive drop in its charging line, but the house batteries were cooked.
After replacing a crimp connection in that car battery charging wire, the problem was resolved.
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