Installation Instructions for Electric Trailer Brake Control Wiring Adapter
Part Number: 302300

Tools Required:

• 10mm Socket & Ratchet or 10mm Wrench
• 1/4” Socket
• Wire Crimpers
• Wire Cutters
• Test Probe

Step-by-Step Instructions:

Step 1: Locate the Vehicle’s Brake Control Harness

1. Locate the electric brake control harness connector under the dashboard:
   • It is positioned left of the steering column, near the emergency brake pedal.
2. Identify the connectors:
   • A 4-pin connector (matches the adapter).
   • A 2-pin connector just above the brake pedal.

Step 2: Plug in the Brake Control Adapter

1. Plug the brake control adapter into the vehicle’s:
   • 4-pin connector (under the dash).
   • 2-pin connector (above the brake pedal).
2. Follow all brake control manufacturer’s installation instructions for wiring and mounting the brake controller.

Step 3: Locate the 7-Way Trailer Harness Connector

1. Locate the 7-way trailer harness connector:
   • It is positioned under the vehicle, behind the bumper, near the center.
2. Carefully disconnect the connector without damaging the locking tabs.
3. Ensure all connector surfaces are clean and free of dirt.

Step 4: Install the Adapter

1. Plug the adapter between the factory socket and the 7-way trailer harness connector.
2. Ensure all connectors are fully seated and locking tabs are engaged.

Step 5: Mount the Adapter Box

1. Locate a flat mounting surface near the 7-way trailer connector.
2. Secure the black adapter box using appropriate fasteners.
3. Position the box with the epoxy side facing downward to prevent water buildup.

Step 6: Route the Black 12-Gauge Wire

1. Connect the black 12-gauge wire to the adapter box using the supplied yellow butt connector.
2. Route the black wire along the vehicle frame, avoiding:
   • Hot pipes
   • Heat shields
   • Fuel tanks
   • Areas that may pinch or cut the wire.
3. Route the wire into the engine compartment, up to the vehicle’s battery.

Step 7: Connect to the Battery

1. Disconnect the vehicle’s Negative (-) battery cable.
2. If not already done, cut the fuse holder wire and attach the ring terminal.
3. Secure the ring terminal to the vehicle’s Positive (+) battery cable.
4. Use the supplied yellow butt connector to connect the fuse holder to the black 12-gauge wire.

Step 8: Finalize Wiring

1. Reconnect the vehicle’s Negative (-) battery cable.
2. Install a 15-amp fuse into the fuse holder.
3. Verify all wiring is secure and free from pinch points, heat sources, or sharp edges.

Step 9: Test the Installation

1. Use a test light or connect a trailer to verify the 7-way connector functions properly.
2. For initial testing, reset the vehicle’s electrical system by temporarily removing the ignition key.

Safety Warnings:

1. Do NOT overload the circuit:
   • Maximum Capacity: 4 axles / 8 brakes (24 amps).
2. Route wires carefully to avoid areas that may cut, pinch, or melt the wire.
3. Always read and follow vehicle manufacturer’s guidelines for towing and electrical systems.
4. Periodically inspect all connections for signs of wear or damage.

Final Notes:

• Ensure the adapter box is mounted securely with the epoxy side facing downward.
• Use cable ties to secure excess wiring and prevent rattling or wire damage.
• Refer to the vehicle owner’s manual for fuse or relay requirements if additional components are needed.

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.