Installation Instructions for Electric Trailer Brake Control Wiring Adapter
Part Number: 303400

Tools Required:

• Trim Panel Remover
• Flashlight

Step-by-Step Instructions:

Step 1: Preparation

1. Make sure the vehicle is off, and the keys are removed from the ignition.

Step 2: Remove the Access Panel

1. Locate the access panel in the center of the dash on the passenger side.
2. Use a trim panel puller to carefully pry the panel away from the dash:
   • Insert the tool at the notch in the panel.
   • Avoid damaging the trim or panel.
3. Unplug any housings attached to the panel.
   • Be careful not to damage the locking tabs.
4. Set the panel aside.

Step 3: Identify the Connector

1. If the vehicle has a factory-installed brake controller:

   • Locate the large grey housing plugged into the back of the unit.
   • You may need to disconnect additional harnesses to access the location.

   NOTE: Disconnecting the factory-installed brake control may cause a fault code to display on the dash message center.

2. If the vehicle does not have a factory brake controller:

   • Locate the grey housing on the back of the trim panel directly left of the access panel.

Step 4: Install the Brake Control Adapter

1. Carefully pull the grey housing toward the access panel opening.
2. Plug in the brake control adapter housing.

Step 5: Route the Adapter

1. Locate a routing path for the adapter to exit the bottom of the dashboard:
   • Use a flashlight to shine light through the bottom of the dash to find an exit hole.
2. Route the adapter securely through the opening.

Step 6: Complete Installation

1. Complete the installation per the brake controller manufacturer’s instructions.
2. Mount the brake controller unit securely as directed.
3. Perform the test procedures provided in the brake controller manual.

Step 7: Reassemble

1. Plug any unused connectors back into their original housings.
2. Snap the access panel back into place.

Notes:

• Vehicles not equipped with an OEM trailer tow package may require additional fuses and relays to complete the output and battery feed circuits.
  • These components are sold separately.
  • Refer to the vehicle owner’s manual for fuse and relay locations.

Safety Warnings:

1. Overloading the Circuit Can Cause Fires:
   • DO NOT exceed the lower of the following:
     • Manufacturer’s towing rating, or
     • Maximum Capacity: 3 axles / 6 brakes (18 amps).
2. Carefully follow all vehicle warnings and safety precautions.
3. Always read and follow the vehicle owner’s manual and brake controller instructions.

Wiring Overview:

• Trailer Brake Controller (Output): Sends braking signal to the trailer brakes.
• Fused Battery Feed: Supplies power to the brake controller.
• Stop Lamp Switch (Input): Provides braking signal from the vehicle.
• Ground: Connects the controller to the vehicle chassis.

Final Notes:

• Inspect the adapter and connections periodically for wear or damage.
• Ensure all wires are routed away from sharp edges, hot surfaces, and moving parts.

End of Instructions

Installation Instructions for Electronic Brake Control

Product Information:

• Model: Electronic Brake Control for 2, 4, 6, & 8 Brake Applications
• Part Number: N8508211

Components of the Brake Control:

• A. Output (Gain) Control
• B. Boost Control
• C. Manual Slide Control
• D. Bracket Mounting Holes
• E. LED Display

Package Includes:

• (1) Brake Control Unit
• (1) Mounting Bracket
• (4) Self-Tapping Mounting Screws (#6 x 3/8")
• (1) Warranty Card

Tools Required:

• Drill with 1/8” bit
• Wire Crimping Tool
• Probe-Type Circuit Tester
• Wire Cutter/Stripper
• Phillips Screwdriver or 1/4” Nut Driver

Wiring Connections:

• Black Wire: Vehicle Power
• White Wire: Vehicle Ground
• Red Wire: Stoplight Switch
• Blue Wire: Trailer Brakes

Step-by-Step Installation:

Step 1: Selecting a Mounting Location

1. Choose a location that is:

   • Secure and solid for mounting.
   • Easily accessible to the driver.
   • Clear behind the surface to avoid damaging wiring or components when drilling.

2. Use the bracket as a template to mark hole locations.

Step 2: Mounting the Brake Control

1. Drill holes at the marked locations using a 1/8” drill bit.
2. Secure the bracket using (2) self-tapping screws.
3. Mount the brake control unit to the bracket using the remaining screws.

Step 3: Wiring the Brake Control

1. Follow the wiring instructions:

   • Black Wire: Connect to a constant 12V power source using a 30A auto-reset circuit breaker.
   • White Wire: Connect to a solid vehicle ground.
   • Red Wire: Connect to the stoplight switch wire.
   • Blue Wire: Connect to the trailer brake output wire.

2. Ensure all connections are secure and properly insulated.

Adjusting Power to the Trailer Brakes:

1. Connect the trailer to the tow vehicle.

2. With the engine running, hold the Manual Slide Control to the left and set the Output/Gain Control to approximately 5.0.

3. Drive at 25 mph on a dry, level surface.

4. Fully apply the Manual Slide Control:

   • If the brakes lock up: Reduce the Output/Gain.
   • If braking is insufficient: Increase the Output/Gain.

5. Repeat until braking force is just below wheel lock-up.

Boost Settings:

The Boost feature increases brake sensitivity with three levels:

• b.1: Starts braking at 14% power.
• b.2: Starts braking at 28% power.
• b.3: Provides the most aggressive braking for heavy trailers.

To Adjust Boost Settings:

1. Press the Boost Button to display the current setting.
2. Use the + or - buttons to adjust.

Manual Control:

• Location: Right side of the brake control.
• The Manual Slide Control applies trailer brakes without activating vehicle brakes.
• Slide left to apply braking force manually.
• The power level can be monitored on the LED display.

LED Display Information:

Troubleshooting:

Brake Adjustment Guide:

1. Raise and secure the trailer with jack stands.
2. Remove the brake backing plate cover.
3. Adjust the brake shoes outward until the wheels are hard to turn.
4. Back off slightly until the wheels spin freely with a slight drag.

Safety Notes:

1. Always test trailer brakes at low speeds.
2. Do not exceed the vehicle's Gross Combined Weight Rating (GCWR).
3. Regularly inspect and adjust trailer brakes every 3,000 miles.

Technical Assistance:

For technical support and assistance, our team of experts is available to help.
You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.

Warranty Information:

• Limited Warranty: Covers defects in materials and workmanship.
• Excludes misuse, improper installation, and normal wear and tear.

For complete warranty instructions, please download the full installation PDF.