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Old 07-04-2021, 04:21 AM   #1
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Join Date: Jul 2021
Location: Warren
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12v electrical issue

We have a Jay Feather Ultra Lite, and I've suddenly developed an electric issue. Everything works fine on shore power, everything thing works fine on the battery, but as soon as I hook up to tow the fuse blows..... We just got a new to us F150 and had to have a 7 pin harness and electric brake system installed (professionally). Never had this problem when we pulled with our Mountaineer for 5 seasons. I've visually checked the wires on the trailer and can't find any shorts or bare spots. Could the tuck be shorting it out? Any help greatly appreciated, as I discovered this July 3 Rd as we were trying to leave for the week!
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Old 07-04-2021, 05:20 AM   #2
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Location: St Johns MI
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wiring plug testing

What fuse blows?

Find out and check that wire in the trailer plug for a short to ground or
wires crossed.
Get a test light or voltmeter and verify the truck plug is wired correctly, power to proper pins when brakes are applied, blinkers work, running lights...
Pin diagram here-
https://www.ajtnt.com/Info/7-Way-Diagram

Professionals do make mistakes.
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