Installation of Brake Controller on 2017 Mazda CX-5

Question

Question:

I would like to add a brake controller to my CX-5. I see that you have a universal kit but the instructions say to connect the controller to the brake light switch. My switch has 4 wires which go to a microprocessor. Which wire connects to the input of the controller?

asked by: Jeff

0

Expert Reply:

To find the correct brake light switch wire on your 2017 Mazda CX-5 you will need to use a circuit tester such as # PTW2993 and find the wire that only shows power when the brake pedal is depressed; that will be the correct wire to hook up.

To install a brake controller like the best-selling Prodigy P3 # 90195 on your 2017 Mazda CX-5 you first need to install Wiring Harness # 118746 to get a 4-way connector and as you mentioned, you'll also need the Universal Installation Kit for Trailer Brake Controllers # ETBC7.

expert reply by: Kyle S

0

Bill T.

9/6/2020

Did anyone ever resolve which of the 4 wires was correct? I've got a green with constant power, then I have a Grey, black and sort of blue color. Thank you!!!!

Reply

Jon G.

9/9/2020

We haven't heard anything else on this issue but I can say the green with constant power that you found is to power the controller. Check the grey, black, and blue color wires to see which one shows power only when the brake pedal is pressed and that's the cold side of your stop light switch. Then you can either test for continuity using a multimeter for the ground wire or you can try applying 12V power to see which of the 2 remaining wires causes the pin in the 5 o'clock position on your vehicle 7-Way to show power. That will be your brake controller output wire.

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Answer 1

Since you have a 7-Way you will only need a few more components to complete a brake controller install on your vehicle. For a wiring kit to install the brake controller and the 7-way adapter you would want the Wiring Kit for 2 and 4 Brake Electric…

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Answer 2

We have a way you can install a 7-way on your 2015 Mazda CX-5 but not all vehicles have custom fit 7-ways made for them so you'd have to start with the more common 4-way like the part #C56011 which is custom fit for your vehicle. From there…

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Answer 3

Hey Steve! I really like having the wiring sit next to the receiver as well so I definitely get where you're coming from. Here are the parts I recommend installing on your 2024 Mazda CX-5: - etrailer Trailer Hitch Receiver #e98902 - Curt…

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Answer 4

The 2 inch trailer hitch I recommend for your 2024 Mazda CX-5 is the etrailer Trailer Hitch #e98902. This is the best due to its matte black powder coat which resists the inevitable scuffs better than other hitches.

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Answer 5

Welcome back Peter! For your 2024 Volkswagen Jetta GLI with dual exhaust the correct hitch is the Draw-Tite item #24978. This hitch is the only one that fits the GLI's with dual exhaust. It mounts behind your rear bumper cover instead of below…

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Answer 6

Between the two wiring harnesses that fit your 2019 Mazda CX-5, Tekonsha #118746 and Curt #C56377, I recommend the Tekonsha. It has a higher maximum amperage than the Curt. Another reason I recommend the Tekonsha is simply because we've always…

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Answer 7

The Curt #C13315 and the Draw Tite part #76138 for your 2019 Mazda CX-5 are both really great options that would both work great for you, but if I had to pick one over the other I would go with the Curt as it is a little less visible at the rear of…

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Answer 8

The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector #C56377 will always be connected to a battery so it will be "on" in the same way that everything else that is connected to the battery of your 2019 Mazda CX-5 is…

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Answer 9

We do have the Draw Tite hitch part #76138 that is a confirmed fit for your 2022 Mazda CX-5 and would work great. This is a mostly hidden hitch with great towing capacities. Then for wiring the Tekonsha kit part #118746 is easy to install and also…

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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

If the rear end of your vehicle sags significantly when the trailer is hooked up then you could have an unsafe condition and your front end and tires will not wear properly. The weight is taken off of the front wheels of the vehicle and can cause…

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Answer 12

The installation videos of the T-One Vehicle Wiring Harness #118746 on a 2017 and a 2019 Mazda CX-5 will be the same as what you'll need to do for your 2018 Mazda CX-5 so either one will work just fine. It looks like the one for the 2019 is a…

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Installation of Brake Controller on 2017 Mazda CX-5

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