How To Install 4 and 7-Way On 2005 Ford F-150 with Factory 4-Way

Question

Question:

Hello. I have a 2005 ford f150 that currently has a four pin trailer connector from the factory No reciever on truck just bumper ball and pig tail in the glovebox to plug a brake controller into the truck harness. I now have a reciever hitch installed and would like direct plug in 7 blade w/ 4 pin pigtail. What are my options? Thanks.

asked by: Alan

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Expert Reply:

The best option to convert the 4-way on a 2005 Ford F-150 to a 4 and 7-way trailer connector is with the Adapter 4-Pole to 7-Pole and 4-Pole part # 37185. The two 4-ways will plug into one another and then you will need to splice into a few wires which is explained below. There won't be a fully plug-in-play option but this one will be close.

expert reply by: Conner L

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Answer 1

Thank you for the photo! The Curt T-Connector #C56031 you purchased is the correct replacement wiring harness for your 2005 Ford F-150 without a factory 7-pole connector (only a 4-pole) regardless of the style of connector on the factory harness. The…

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Answer 2

To replace your trailer wiring on your 2005 Ford F-150 with a setup that has both a 7-way and a 4-way the easiest solution is the part #C55774. This plugs into the round connector your 7-way currently plugs into and provides both styles of connector…

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Answer 3

Thanks for reaching out, Jack! What I recommend using is the Curt Adapter #C57672 and securing it to your vehicle with the No-Drill Bracket #18136. This gives you the ability to seamlessly use either the 4-Way or 7-Way connection but doesn't…

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Answer 4

The #ETBC7 or #ETBC7L will differ from the Curt #C57672 in that these two parts both come with all of the wiring, breakers, mounting bracket and connectors needed to complete the job; the Curt #C57672 is just the 7 way connector without any of the…

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Answer 5

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 6

We had the chance to install the Tekonsha 7-way kit part #118247 on a 2004 Ford F-150 and we did find the correct connector. It's possible maybe you are trying to use the wrong connector. Try checking out the attached install video link to…

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Answer 7

Brake controllers require a fairly substantial ground which can be achieved by connecting the controller ground to the negative battery terminal. In some situations a chassis ground is fine but if you are running wires through the firewall anyway…

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Answer 8

The type of fitting to use will depend on the thread type used on the transmission line fittings on your 2010 Ford F-150. If they are 1/2"-20 threads use kit #D13024. If they are 5/8"-18 use #D13025. If you can measure the diameter of the…

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Answer 9

The Derale Series 8000 Plate-Fin Transmission Cooler Kit, #D13503, would be a great choice for your 1994 Mercury Grand Marquis, as long as there is room in front of the radiator and ac condenser for the cooler to mount. Measure to be sure before…

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Answer 10

Hey Pat, So because you have 1/2" fittings on your F-150, all you'd need are adapters and you're set. So for the transmission cooler go with one that is large to get you the most cooling, which is the 11" wide x 7-1/4" tall x…

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Answer 11

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 12

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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How To Install 4 and 7-Way On 2005 Ford F-150 with Factory 4-Way

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