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12 Volt Lights Inside Trailer Get Bright and Then Dim

by Jerry
(Texas)

I have replaced the battery, seemed to solve the problem. But I have noticed that they are doing it again, being bright and then they dim. I have checked the system with a volt meter at both stages. When bright I have 13.4 dc volts when dim 11.4 dc volts. Any suggestions?

ANSWER: Greetings Jerry thanks for submitting your question on our Ask An RV Question Page.

I am going to have to assume that the problem you are experiencing is happening when the Trailer is hooked up to shore power.

I believe that the problem is being caused by your Trailer's Electric Converter. The converter could be overheating and switching back and forth between battery and converter power.

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Depending on the brand of converter you have and the load that is on the converter it should be providing between 13.6 volts DC (under light load) and 12.6 Volts DC (under high load). Again this could vary by Converter brand, but a properly operating converter should not drop down to 11.4 volts, that is why I believe that your converter has a problem.

I hope this helps.

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