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How to Activate 12-V Feed to 7-Way Trailer Connector on 2015 Ford F-350

Question:

I have a 2015 ford 350 that for what ever reason did not come with the battery charging set up on the seven pin. it is not installed in the truck. How could I wire this to get the seven pin to charge the battery in my RV. Ford said they have no idea or after market product which will do this. Thanks

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Expert Reply:

The 12-V feed to the 1:00 pin on the 7-way is protected by 2 fuses in the engine compartment fuse box, so I'd make sure those are in place and not blown first. Look for a 40A fuse in location # 10 and a 25A fuse in location # 90.

Some of the lower-level optioned Ford trucks simply don't have those fuse locations wired. If that's the case with your truck, you'll need to run your own feed from the 7-way up to the battery. We offer a kit that includes the wire, circuit breaker and hardware to do this, part # RM-156-75.

I'll link to a video that explains the installation.

expert reply by:
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Mike L

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