Circuit Configuration in RV-Type 7-Way Trailer Wiring

Question

Question:

is the 7 way plug, standard or RV wiring

asked by: Timothy S

0

Expert Reply:

Your photo shows the 7-way trailer wiring setup that we call the RV format. The photo I linked shows an actual trailer plug # A10-7W6 like yours and the circuit arrangement is the same as your photo diagram. For reference, the included article covers all wiring formats in detail.

The item you referenced, replacement OEM wiring harness # 118242, is configured in the same way.

expert reply by: Adam R

0

click to enlarge

Matthew H.

5/4/2020

HelloI have a 09 F150 and I am the second owner. From what i read is Ford doesnt install the Relay and fuse in the truck. And the previous owner didnt leave them in the glove box. What fuses do i need? Some type of relay? Whats the part number? Please

Chris R.

5/7/2020

Which particular circuit on the 7-Way are you needing a fuse/relay for? All of the fuse locations should be listed out in your truck's owner's manual, but if you can tell me what specific circuit you're looking for I would be happy to try and track this info down.

Matt H.

5/8/2020

@ChrisR From what I've researched on the 09 f150. Ford didn't put in the fuses in for the 7way. I'm needing to know what fuse and relay I need to use the 7way, to pull my rv. Hope that makes sense.

Chris R.

5/11/2020

The owner's manual for your F-150 lists several fuses and relays for the various circuits on the 7-Way. Is every pin/circuit on the 7-Way dead? According to the manual inside the main power dist. box under the hood there is a: trailer lamp relay in the #6 position, 12V trailer circuit relay in the #9 position, 30A trailer brake circuit fuse in the #17 position, 30A 12V trailer fuse in the #21 position, 20A trailer park relay in the #31 position, trailer left turn/stop relay in the #37 position, trailer right turn/stop relay in #38, 20A fuse for stop/turn in #45 position, and a 15A fuse in the #58 position for trailer backup lamps.

Answer 1

The reason that 10 Gauge #10-1-1 or 12 Gauge #12-1-1 wire is recommended for 10" brake assemblies, like part #AKEBRK-35-SA, is because they pull more power than the lights on your trailer. I believe the green wire you are referring to carries…

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Answer 2

Hardware is not included for the Optronics LED Trailer License Plate Light w/ Bracket - 5 Diodes - Clear Lens Item #LPL55CB, but you can make a trip to the local hardware store and pick up some bolts and nuts to secure the license plate, light…

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Answer 3

It sounds like you have tested your truck with other trailers and your trailer with other trucks and have found the wiring circuits to connect and function correctly. This tends to suggest that there is just an issue between the two specific…

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Answer 4

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 5

A trailer that is over 80 inches wide is required by DOT regulations to have rear clearance lights. An over 80 inch taillight kit, like part #TL16RK, will have the side clearance light built into it. An under 80 inch taillight does not have the…

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Answer 6

Hey Sparky. If your 2008 Ford E-450 came with a factory 4-way connector, the factory brake controller harness is a brown 6 pin connector located behind the hood release latch up near the firewall inside the cab. There is a gray connector in a similar…

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Answer 7

Hey, Stephen! We got just what you need. Since you don't have a tow package, I'm not sure if you have a hitch on your 2025 Ford Ranger so I'll include one just in case. Draw-Tite Max-Frame Trailer Hitch Receiver Part #DT35PR Curt…

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Answer 8

Hey Zack, for your 2023 Ford F-150 what you'd need to add both a 4-way and a 7-way would be the part #HM40975. This would plug into the round connector at the rear of your truck and would give you both connectors you need. If you don't have a…

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Answer 9

Your 2001 Ford F-150 likely came with a factory 4-Way and someone spliced in a 7-Way at some point. To determine if the truck is set up already for a fully functional 7-Way you can check under the hood to see if the necessary relays and fuses are…

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Answer 10

There may still be fuses/relays that are missing or damaged. On my Ford the owner's manual fuse block diagram does not match the actual fuse box (!) so I recommend you check both the manual and the lid of the fuse box which should have a legend…

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Answer 11

It sounds like your 1997 F-150 does not have the tow package wiring so the wiring harness #118242 will not work on your truck. To install a 7-Way trailer connector at the back of your truck, you will need to start with a working 4-Way connector,…

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Answer 12

For your Geo Pro Camper with a 59" frame rails width the DrawTite Multi-Fit Motor Home Trailer Hitch part #82201 is an excellent choice. I like the really low profile it offers allowing it to fit snugly up under the camper. It mounts with the…

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Circuit Configuration in RV-Type 7-Way Trailer Wiring

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