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Tech & Fab
Battery Charging to a trailer
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<blockquote data-quote="ChopTop84" data-source="post: 1535381" data-attributes="member: 19210"><p>If your truck is new enough, the charge wire is already there (on a 7 pin big round connector anyway), and if you have trailer brakes and a breakaway switch on your trailer, the trailer end should be wired for charge already also.</p><p></p><p>The truck *MAY* need a relay installed under the hood, along with a fuse. Depends on model year and package. Fords came with a bag in the glovebox that you installed yourself that had all the parts already.</p><p></p><p>Otherwise, its automatic. When truck turns on, it activates the relay and starts charging the battery at about 10 amps of power. When you turn off the truck, it disconnects the charge relay and no worries about isolation.</p><p></p><p>Charge wire should be Pin #4. Black wire. 10 gauge.</p></blockquote><p></p>
[QUOTE="ChopTop84, post: 1535381, member: 19210"] If your truck is new enough, the charge wire is already there (on a 7 pin big round connector anyway), and if you have trailer brakes and a breakaway switch on your trailer, the trailer end should be wired for charge already also. The truck *MAY* need a relay installed under the hood, along with a fuse. Depends on model year and package. Fords came with a bag in the glovebox that you installed yourself that had all the parts already. Otherwise, its automatic. When truck turns on, it activates the relay and starts charging the battery at about 10 amps of power. When you turn off the truck, it disconnects the charge relay and no worries about isolation. Charge wire should be Pin #4. Black wire. 10 gauge. [/QUOTE]
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