The Brake Controller Installation Kit, or ETBC7, includes everything necessary for converting your 4-way connector to a 7-way connector in order to use a brake controller to activate the electric brakes on your trailer.
If you do not have a 7-way plug on your vehicle, but want to use your electric trailer brakes, you will need to upgrade your wiring to support the brake controller. The ETBC7 includes everything you need to make this upgrade (once a working 4-way connection is installed).
7-way trailer connector, which includes a 4-pole adapter plus 4 additional wires that connect to your vehicle to complete the installation
Mounting bracket and mounting hardware that secure the 7-way connector to the vehicle bumper or hitch; self-tapping screws mount the bracket to the vehicle and the trailer connector to the bracket
Black loom, which is a hard plastic tube that covers the 12-volt hot lead and brake wire connections, giving your installation a professional appearance and extra protection
Gray duplex cable that houses 2 wires that will become the 12-volt hot lead and electric brake wire, which run from the trailer connector to the front of the vehicle
Circuit breakers, which are used to protect electrical components against overload (3 are provided, 2 are used)
Butt connectors for securing connections between wires
Ring terminals, which attach to the ends of wires and hook around battery posts and circuit breakers
Quick splice wire connectors, which are used to quickly connect wires together
Zip-ties, which bind loose wires together and keep them in place, away from moving parts and exhaust system components
Circuit tester
The ETBC7 installation kit works with your existing 4-way connector and brake controller. If you do not currently have a 4-way connector on your vehicle, you can use the Vehicle Wiring Fitguide to locate the custom-fit wiring harness, and the Brake Controller Fitguide to find the brake controller for your application. Since this kit supplements your brake controller, please review the instructions included with your brake controller before beginning the installation.
1. Find a suitable location to mount the 7-way connector plug.
2. Plug the 4-pole adapter coming out of the 7-way connector into the vehicle's 4-pole trailer connector. Secure this connection with a zip-tie.
3. Ground the 7-way connector by screwing the white wire with a ring terminal on it into the frame of the vehicle. If you will be using your reverse trailer lights, attach the yellow wire coming out of the 7-way connector to your reverse light wire, using one of the quick splice wire connectors included with the kit.
4. Make a small cut in the rubber sheath of the duplex cable and slightly separate the two wires inside, being careful not to nick these wires.
5. Use a butt connector to connect the black wire in the duplex cable to the 12-volt hot lead (black wire) on the 7-way connector. Then do the same for the white wire in the duplex cable and the brake wire (blue wire) on the 7-way connector. Use electrical tape to keep the wires together and then install the black loom over the wires.
6. Route the duplex cable under the vehicle all the way up to the engine compartment under the hood, being careful to avoid hot areas or moving parts that might pinch the cable.
7. Once the duplex cable is under the hood, you will need to separate the white brake wire from the black 12-volt hot lead. Cut away the gray sheathing as before, being careful not to nick the wires.
8. The black 12-volt hot lead will stay under the hood, where it will be connected to the positive post of the battery by using a 40-amp circuit breaker. You will then route the white brake wire through the firewall (on the driver's side under the dash) into the vehicle, where you will connect it to the blue wire on the brake controller.
9. Look for a grommet or knockout in the firewall to route the white brake wire into the cab. If none is available, you can drill a hole on a section of the firewall where there is no obstruction on either side. You will need to drill a hole to install a grommet large enough for the 3 wires that will pass through:
10. Using a butt connector, connect the blue wire coming out of the brake controller to the white brake wire from the duplex cable that was routed through the firewall.
11. Mount the 20-amp (or 30-amp; see brake controller instructions) and the 40-amp circuit breakers in a safe location under the hood. In this photo, you will see it was mounted to the right of an existing ground wire on the firewall.
12. The 12-volt hot lead from the trailer connector in the duplex wire (black) gets routed to the 40-amp breaker. Cut the extra wire and add a ring terminal. Attach to the AUX/silver post of the circuit breaker and route a wire from the copper post of the circuit breaker to the positive post on the battery.
13. The black wire coming out of the brake controller is the brake controller power supply. It will be too short to reach the battery, so you will have to use excess wire from the duplex cable to complete this connection. Route this wire to the AUX/silver post on the 20-amp (or 30-amp) circuit breaker under the hood. Then route a wire from the AUX/copper post of the circuit breaker to the positive post on the battery.
14. There are now two wires connected to the positive post: the 12-volt hot lead and the brake controller power supply.
15. The white wire coming out of the brake controller is the ground wire. Route this wire to the negative post on the battery. It will be too short to reach the battery, so you will have to use excess wire from the duplex cable to complete this connection.
16. Inside the cab, only one connection remains. Find the wires connected to the brake stop light switch at the top of the brake pedal. Using a circuit tester, test the wires to locate the wire that carries a signal only when the brake pedal is engaged. Using a quick splice wire connector, connect that wire to the brake controller red wire.
17. With the brake controller mounted and connected, zip-tie any loose, excess wires underneath the dash and under the vehicle. Clip any excess material from the zip-ties. Do not allow the wires to interfere with the brake and gas pedals and keep them away from areas that get very hot. Using a circuit tester, test all wires to ensure that they are getting power before you hitch up your trailer.
# ETBC7 Installation Diagram
Connector Diagram for # C57672 (included with # ETBC7)
For more information on brake controllers and wiring, see the following:
Updated by: Amber S.
Last updated: 6/5/19
didnt see a price on wire and brake sys. can i get a price to fit 2019 jeep grand cherokee thanks 86255
Are you looking at a particular brake controller model? All our pricing is listed on the individual product pages. 68212
Would you mind telling me what gauge/type of wire the grey duplex cable is and how many feet are supplied? I cut mine too short and tried splicing but made a mess of it. I was going to buy a replacement locally, since I need my brakes working by this weekend! 84772
The Wiring Kit # ETBC7 includes 25 feet of 10 gauge duplex wiring. 67904
Good Morning, I have a 2004 Winnebago Journey 36G and I need a electric brake controller. Is there a kit that will plug into a factory plug or will it need to be hardwired? Thanks! 81968
From what I could find it looks like your 2004 Winnebago Journey is built on the Freightliner XC chassis. If this is the case and it's equipped with the factory 7-Way at the bumper, you can use the Plug-In Play Harness # 3027-P to allow for a simple installation of a Tekonsha or Draw-Tite controller. I specifically recommend the Tekonsha Prodigy P2 # 90885 . 67346
I installed your T-One wiring harness no problem. Thank you. Now i need to install the ETBC7 kit, but I dont know where the blue wire will go, as I also ordered a Curt Echo Wireless Trailer Brake Controller - 1 to 2 Axles - Proportional Item # C51180, which mentions a ETBC7L? Did i buy the wrong wiring ETBC7 kit? 74360
The blue wire is used for the brake output circuit, which isn't needed for the Curt Echo Brake Controller # C51180 . It can simply be capped off. The Wiring Kit # ETBC7 that you purchased isn't the "wrong" kit for the Echo, you'll simply just have some extra wiring. No big deal. The alternate # ETBC7L is just a better match for that controller because it comes only with the wiring that's needed. 61509
@ChrisR OK, Thank you for the clarification. 61534
I need to add a 5th pin to a flat four pin connector. What wire do I tap on the vehicle to get the reverse light on a 2017 Toyota Tacoma? Thanks 74201
The Tow Ready Adapter # 20036 is perfect for this application. It'll plug into your existing 4-Way and the additional blue wire is what splices into the Tacoma's reverse circuit wire. Unfortunately I don't have access to a wiring diagram that reliably shows what color this wire is on your 17 Tacoma, so your best route is to simply test the wiring behind one of the tail lights. Check to see which wire gets power when the reverse lights are activated. 60367
"WOW! I am impressed! I called to place my order and real person answered, spoke perfect English, albeit a slight southern accent, and my order was sent within a day, shipped quickly and I had it a few days later. I saved over a hundred dollars over local and installed it my self. I cant imagine how that they could do any better. THANKS!"
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