How to Replace the Trailer Connector and Wiring Harness on a 2002 Ford F-150

Question

Question:

I have a 2002 f150 that I need to replace the trailer plug harness. I have both 4 way and 7 pin plugs and this looks oem. Xl3t-14a624-ba is the Ford pn# on the 7 way. I see this part on your website but i need the 4 way as well. Both plugs are in 1 bracket

asked by: Jason

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Expert Reply:

I have exactly what you need to replace the 4 and 7-way trailer connector and wiring harness on your 2002 Ford F-150. In order to do this you are going to want to use both the Ford Replacement OEM Tow Package Wiring Harness part # 118242 and the 7- and 4-Pole Trailer Connector Socket part # HM40975.

The wiring harness is not available separately so what you will need to do is instead of using the included 7-way you would need to swap that out for the 4 and 7-way trailer connector which will plug into the harness without any cutting or splicing. This will be the best option we have for you to replace the trailer connector and trailer harness on your F-150.

expert reply by: Conner L

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Answer 1

If you aren't getting any trailer lights at all I first recommend testing the connector itself on your F-350 with a circuit tester like #PTW2993. Test the pins while you have a buddy run through the lighting functions in the cab. If you don't…

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Answer 2

When you test the 4-Way on the Curt T-Connector Wiring Harness, part #56016, at the rear of your vehicle, it should show now power on all 3 pins with the lights off. If you have the vehicle head lights on, you should have around 12 volts at the brown…

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Answer 3

I can help you understand the reason there is different information on our website. Special trailer tires have a maximum speed rating, just like passenger car and truck tires. Older tires have no special marking to designate a limit. Their maximum…

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Answer 4

No, the Replacement Mounting Hardware #C75JR is not going to fit the Curt Class III Hitch #C13135. If you are in need of a hardware kit for the #C13135 hitch, we can provide that with Part #RHK. When you go to the page for #RHK you will see a box…

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Answer 5

The sticker on the Curt Trailer Hitch Receiver #C13182 is removable, but I strongly recommend against doing so. The sticker contains important information like the Tongue Weight (TW) and Gross Trailer Weight (GTW) ratings. Although I understand the…

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Answer 6

Since you found low voltage when testing the right side signal light pin on the vehicle connector, you have at least isolated the issue to the truck. If all the wires appear to be in good condition, then the issue is likely either a weak ground like…

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Answer 7

I would try unplugging the harnesses and relays and then plugging them back in as it sounds like the left turn signal circuit is not making contact somewhere and it could be as simple as reconnecting the harness to fix the problem. Next. I would…

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Answer 8

Part #C55344 works for your 2001 Ford F-150. We do not currently have an install video for you to reference, but this is a straight forward install. You remove the driver side tail light, plug in the new harness, drop the rest of the wires down, run…

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Answer 9

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 10

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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Answer 11

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 12

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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How to Replace the Trailer Connector and Wiring Harness on a 2002 Ford F-150

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