No Reverse Light Circuit When Towing with a 2017 BMW X5

Question

Question:

I purchased a hitch and wiring for my 2017 x5...the kit that will allow you too connect without splicing wires. The issue I have is I have no reverse light connections. Please help me with this. My trailer will not go in reverse.

asked by: Bryan

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Expert Reply:

I looked up your order and saw that you have purchased both the ZCI Circuit Protected Vehicle Wiring Harness part # 119250KIT and the Universal Installation Kit for Trailer Brake Controller part # ETBC7. The ZCI kit as you mentioned will not require any cutting or splicing. However, the 4-way included in this kit does not have a circuit for the reverse lights. The reverse light circuit is obtained through the 7-way trailer connector with the purple wire. The purple wire from the 7-way on the Universal Installation Kit will need to be spliced into the vehicle's reverse light circuit with part # SWC501746-1. You will need to use a circuit tester like part # PTW2993 to make sure you choose the correct wire on the vehicle.

expert reply by: Conner L

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Answer 1

Hi Alberto; the Curt #C37RV is what you need for your 2024 Hyundai Santa Fe Caligraphy Hybrid. Curt redesigned the older hitch so this fits all models of the 2021-2025 Santa Fe, including your Caligraphy Hybrid. This is a Class III hitch with a…

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Answer 2

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 3

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 4

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 5

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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Answer 6

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 7

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 8

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 9

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 10

Hi David! There are quite a few hitches offered for your 2026 Honda Odyssey, so I definitely understand wanting to know the differences. There are basically three styles available for you and I have them broken out below: Exposed Crosstube: etrailer…

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Answer 11

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Answer 12

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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No Reverse Light Circuit When Towing with a 2017 BMW X5

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