Recommended Brake Controller And Wiring For 2015 Mercedes-Benz Sprinter

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Question:

I have a 2015 MB sprinter 3500 with factory hitch/wiring I need brake controller for trailer and wiring connector please let me know what will work best Thank you

asked by: Steve

1

Helpful Expert Reply:

I called my contact at Tekonsha and they have not had a chance to install a brake controller on a 2015 Sprinter. You will need to do some testing and hardwire the installation.

I recommend using a circuit tester like part # 40376. You will want to test the wires under the dash for function.

I recommend a brake controller like part # 90885. This is a proportional brake controller that sends a signal to the brakes in direct proportion to the brakes applied in your Sprinter.

The wires from the brake controller should be attached in the following manner: The Black wire should be run to the positive post on the battery via a 20 A circuit breaker. The White wire is run to the negative side of the battery. The Blue wire will be run to the trailer connector. The red wire is attached to the cold side of the stop light switch. Using the tester you want to locate the wire that only show current when the brake pedal is pressed, and at no other time. I am not certain of the color wire you will have on the Sprinter but it should be a pink wire with a green stripe. It is always best to thoroughly test to make sure.

If you have a 4-way connector at the back of your Sprinter, you will need part # ETBC7. This attaches to the 4-way and with additional wiring as shown in the attached video, you will have a 7-way connector at the back of your vehicle to that connects to the trailer.

I also recommend a bracket like part # 18138 to secure the 7-Way connector.

When working with electrical connectors I recommend using dielectric grease like part # 11755. This keeps dirt and moisture out of the electrical connections and helps prevent corrosion.

expert reply by: Jeffrey L

1

Answer 1

There is no plug-and-play brake controller harness for the 2017 Mercedes-Benz Sprinter 2500 so brake controller installation will be a hard-wire process. Under the driver's seat there should be a green plug. The wires to this plug can be tested…

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Answer 2

According to my research, if your 2017 Mercedes-Benz Sprinter 2500 came with a factory 7-way trailer connector then you will have the brake controller connector pre-wired. This pre-wired connector should be under the driver side seat which you can…

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Answer 3

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 4

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 5

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 6

Hey Travis, congrats on the new 2024 Jayco Flight 284BHS! Your travel trailer looks to have a GVWR of 7,950 lbs so I recommend going with the Equal-i-zer Weight Distribution w/ 4-Point Sway Control #EQ37121ET and pairing it with the Shank…

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Answer 7

When it comes to choosing between the Blue Ox Patriot #BLU37TR and the Brake Buddy Select 3 #HM39524, these systems are extremely similar in their setup and functionality. Both of these systems provide proportional braking in a compact and easy to…

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Answer 8

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

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Answer 9

Whether or not you can flat tow with a Jeep bumper is really up to the manufacturers testing; some of the big names like MetalCloak or Poison Spyder have bumpers with D-ring attachments that can be used for flat towing connections. This is great…

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Answer 10

Sure thing, I will go ahead and list out what you need for your 2023 Kia Sportage to add a 7-way for a brake controller so you can tow with the Curt Trailer Hitch Receiver #C94WR: - T-Connector Vehicle Wiring Harness with 4-Way Flat Trailer Connector…

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Answer 11

Yes, when installing the knob for the Redarc Tow-Pro Liberty Brake Controller item #RED24FR you will want to remove any extra material behind the insert. I am happy the video was able to help you out. I have linked a couple of pictures from the video…

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Answer 12

Hey Donald, the best Blue Ox weight distribution would be the pat #BXW0550 as it has a perfect tongue weight range for your 450 lb tongue weight trailer.

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Recommended Brake Controller And Wiring For 2015 Mercedes-Benz Sprinter

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