Is Additional Breaker or Fuse Needed to Power Trailer Jack that Uses 7-Way Connector

Updated 08/02/2018 | Published 08/01/2018

Products Featured in This Question

Pollak 6-Pole, Round Pin, Trailer Wiring Connector - Trailer End

(177)

$8.05

40 Amp In-Line Circuit Breaker - Perpendicular Mount Bracket

(98)

$9.89

Question:

I have a 2014 F-350 to pull trailers for my boss. He recently purchased electric tongue Jacks that have a separate 7 way cord to plug into the truck to receive power just to operate the Jack from the truck battery. All of my fuses and relays are intacked and in working order to operate normal funtions on the trailer such as lights and brakes but my boss said that I have to install an additional fuse or relay in my fuse box to operate the Jack. Can you tell me what amp fuse that I need and which space does it go in in my fuse box?

asked by: Victor

Expert Reply:

Typically the 12 volt accessory circuit for trailer 7-way wiring is protected by a 40 amp fuse or breaker like the part # 9510. If your 12 volt accessory circuit on your 2014 F-350 is already active there would be no need to install a different or additional fuse or breaker. You would be fine as-is. 7-way powered jacks are designed for standard amperage available at the rear of a 7-way so what you'd have is fine.

expert reply by: Jameson C