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Troubleshooting Low Output Voltage on Hopkins Trailer Taillight Converter Box

Question:

Hello Experts, Application: Trailer hookup from International school bus. Qty 4 ea model: 310-0041-560 Rev. c09-10 All four converters outputs are 5vDC or less to trailer. Voltage in to converter is 12vDC. What could cause the low output?

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Expert Reply:

It's possible the converter has an internal short and is damaged. Or it could be possible that you have a weak ground for the converter. Most likely though the box has shorted out. They are designed to fail as a way to prevent a short in trailer wiring from making it back up to the vehicle wiring so that is what is happening.

You'd want to track down the short on the trailer wiring and fix it before replacing the converter.

expert reply by:
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Jameson C

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