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Old 07-14-2015, 08:17 PM   #1
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Battery overcharging???

I have a '98 Jayco Eagle and a few weeks ago I had the camper plugged in at my house. When I unplugged the trailer to go camping I noticed I had no power inside the camper. I checked the fuse at the battery and not only was it blown, the fuse and the holder were melted. None of the 12 volt systems seem to be affected while plugged into shore power. Could there be an issue with the inverter, or would the battery be a more likely suspect?
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Old 07-14-2015, 08:22 PM   #2
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You mean converter right? It could be either but you will need a good battery to find out.
I would have it checked under load first, then after the fuse is replaced start testing.
A 16 yr old converter may not have a smart charge cycle and could have over charged the battery and boiled it dry.

Tests will id the problem.
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Old 07-14-2015, 08:26 PM   #3
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This is the second thread recently about a blown and melted fuse. The most likely cause is a loose or corroded fuse holder. This COULD have been aggravated by excessive charging current OR excessive discharge current. Checking your battery with a hygrometer might tell you if you have a failed cell. Check the voltage from the converter. If it exceeds 15 volts it may have a problem.
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Old 07-14-2015, 08:45 PM   #4
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Quote:
Originally Posted by tnchuck100 View Post
This is the second thread recently about a blown and melted fuse. The most likely cause is a loose or corroded fuse holder. This COULD have been aggravated by excessive charging current OR excessive discharge current. Checking your battery with a hygrometer might tell you if you have a failed cell. Check the voltage from the converter. If it exceeds 15 volts it may have a problem.

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Old 07-18-2015, 05:46 PM   #5
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So, I brought my Fluke home from work and did some testing...
I plugged in the trailer with battery disconnected, there is a rock steady 13.5 volts at the battery wire. I replace the fuse holder and checked the battery, there is only 10.4 volts (probably a shorted cell).
I installed the fuse and re-checked voltage, there is only 12.5 at the battery but inside at the 12 volts fuse block there is still 13.5.

Looks like I have a bad battery.
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