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Using 12-Volt Accessory Feed From Trailer Connector to Maintain Battery on Pop-Up Trailer

Question:

Can i use the blue aux circuit to charge the battery on the pop up trailer?

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Expert Reply:

Typically, the blue wire on a 6-way connector is used to carry the output voltage from the brake controller.

The 12-volt auxiliary feed, which usually feeds the center pin on the trailer connector can be used to maintain a fully charged battery, but will not have enough amperage to charge a dead battery.

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expert reply by:
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Mike L

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