For 2003‑2009 Toyota 4Runner Tekonsha BRAKE‑EVN Brake Control + Plug & Play BC Adapter By Tekonsha
Model: 8508220 3040-7912003-2009 Toyota 4Runner
This Bundle Includes the Following Parts:
Tekonsha BRAKE-EVN Brake Control
Plug & Play BC Adapter
List of fitment years:
2003, 2004, 2005, 2006, 2007, 2008, 2009
BRAKE-EVN™ Proportional Brake Controller for Trailers with 1-4 Axles, Black Manufactured by: Tekonsha
The Tekonsha BRAKE-EVN brake controller offers advanced proportional braking by applying brake pressure to match the vehicles deceleration rate. Proportional braking gets you get smoother stops that traditional time based controls. The boost feature gives the ability to apply more initial braking at the onset of stopping when towing heavier loads. When adjusted properly for your load, proportional brake controls can even extend the life of your vehicles brakes. The large LED display is easy to see when adjusting the control to handle the weight of your loaded or unloaded trailer. The BRAKE-EVN brake control can handle up to brake 4 axles and offers a simple plug in installation option, so be sure to get the proper factory harness for your vehicle. The perfect choice for light or heavy trailer loads.
• 1-4 Axle capacity
• Boost feature gives ability to apply more initial trailer braking
• Reverse battery protection
• No leveling required
• Diagnostics features incorporated in easy to read LED display
• Plug & Play feature allows for quick and easy connections
• Small compact design designed for todays dashes
• Simple push button adjustments
Trailer Brake Controller Wiring Harness Manufactured by: Tekonsha
Our 2-Plug units are designed for brake controls that have a wiring port built into the back of the unit. Simply plug the brake control end of the wiring harness into the back of the brake control and the vehicle end into the automobile's port. Brake controls that utilize the 2-plug style of wiring harness will be identified with the Plug & Play logo.
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Product Details
- Brand: Tekonsha
- Model: 8508220 3040-791
- Includes: BRAKE-EVN Proportional Brake Controller for Trailers with 1-4 Axles, Trailer Brake Controller Custom Harness
Compatibility Chart
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For 2003-2009 Toyota 4Runner Tekonsha BRAKE-EVN Brake Control + Plug & Play BC Adapter By Tekonsha Install Notes
Installation Instructions for Electric Trailer Brake Control Wiring Adapter
Part Number 304000
Tools Required:
- Drill with 3/32” Bit (if needed)
- Phillips Head Screwdriver
Step-by-Step Instructions:
Step 1: Locate the Vehicle’s Electric Brake Control Harness
- Locate the electric brake control harness:
- Underneath and left of the steering column, taped to another harness near the emergency brake pedal.
- The harness features a 5-pin connector matching the adapter plug.
Step 2: Secure the Ground Wire
- Find a suitable grounding point near the harness, such as:
- An existing ground stud, or
- If necessary, drill a 3/32” hole into a metal surface.
- Use the provided eyelet and screw to secure the white ground wire to the grounding point.
- CAUTION: Do not drill into the vehicle floor or bed.
- Clean dirt, rust, or rustproofing from the area before securing.
Step 3: Connect the Adapter
- Plug the brake control adapter into the 5-pin connector of the vehicle’s electric brake control harness.
- Follow the brake control manufacturer’s installation instructions to:
- Wire the adapter to the brake controller, and
- Mount the brake controller securely as instructed.
Final Step: Test the Installation
- Follow the test procedures provided by the brake controller manufacturer to confirm proper operation.
Warnings:
- Circuit Overload Can Cause Fires:
- DO NOT exceed the lower of:
- Vehicle towing capacity specified by the manufacturer, or
- Maximum Capacity: 4 axles / 8 brakes (24 amps).
- DO NOT exceed the lower of:
- Read and follow the vehicle’s owner’s manual and the brake control instructions.
Safety Notes:
- Always wear safety glasses during installation.
- Periodically inspect all wiring and connections for signs of damage or wear.
- Ensure wires are routed away from:
- Sharp edges
- Moving components
- Hot surfaces
End of Instructions
Installation Instructions for Electric Trailer Brake Control Wiring Adapter
Part Number 304000
Tools Required:
- Drill with 3/32” Bit (if needed)
- Phillips Head Screwdriver
Step-by-Step Instructions:
Step 1: Locate the Vehicle’s Electric Brake Control Harness
- Locate the electric brake control harness:
- Underneath and left of the steering column, taped to another harness near the emergency brake pedal.
- The harness features a 5-pin connector matching the adapter plug.
Step 2: Secure the Ground Wire
- Find a suitable grounding point near the harness, such as:
- An existing ground stud, or
- If necessary, drill a 3/32” hole into a metal surface.
- Use the provided eyelet and screw to secure the white ground wire to the grounding point.
- CAUTION: Do not drill into the vehicle floor or bed.
- Clean dirt, rust, or rustproofing from the area before securing.
Step 3: Connect the Adapter
- Plug the brake control adapter into the 5-pin connector of the vehicle’s electric brake control harness.
- Follow the brake control manufacturer’s installation instructions to:
- Wire the adapter to the brake controller, and
- Mount the brake controller securely as instructed.
Final Step: Test the Installation
- Follow the test procedures provided by the brake controller manufacturer to confirm proper operation.
Warnings:
- Circuit Overload Can Cause Fires:
- DO NOT exceed the lower of:
- Vehicle towing capacity specified by the manufacturer, or
- Maximum Capacity: 4 axles / 8 brakes (24 amps).
- DO NOT exceed the lower of:
- Read and follow the vehicle’s owner’s manual and the brake control instructions.
Safety Notes:
- Always wear safety glasses during installation.
- Periodically inspect all wiring and connections for signs of damage or wear.
- Ensure wires are routed away from:
- Sharp edges
- Moving components
- Hot surfaces
Attention:
This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.
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.
Installation Instructions for Electronic Brake Control
Product Information:
- Model: Electronic Brake Control for 2, 4, 6, & 8 Brake Applications
- Part Number: N8508220
Tools Required:
- Drill with 1/8" drill bit
- Screwdriver or 1/4" Nut Driver
- Wire Cutter/Stripper
- Wire Crimping Tool
- Probe-type Circuit Tester
- Assorted End Wrenches
Components Included:
- Brake Control Unit
- Mounting Bracket
- Mounting Screws (#6 x 3/8") (Qty: 4)
- Warranty Card
Mounting Instructions:
-
Select a Suitable Mounting Location:
- Must be securely mounted to a solid surface.
- Must be within easy reach of the driver.
- Ensure the area behind the mounting location is clear before drilling.
-
Mark the Hole Locations:
- Hold the mounting bracket in place.
- Mark the holes using the slots in the bracket as a template.
-
Drill Mounting Holes:
- Use a 1/8" drill bit to drill holes at the marked locations.
-
Secure the Bracket:
- Use two self-tapping screws to secure the bracket.
- Avoid over-tightening to prevent stripping the holes.
-
Mount the Brake Control Unit:
- Secure the unit to the bracket using the remaining two screws.
Wiring Instructions:
-
Connect the Wires:
- Black Wire: Vehicle Power (12V positive battery connection, use a 30A circuit breaker).
- White Wire: Vehicle Ground (secure to a clean, bare metal surface).
- Red Wire: Stop Light Switch (connect to the wire that activates only when the brake pedal is pressed).
- Blue Wire: Trailer Brakes (connect to the brake wire at the trailer connector).
-
Verify Wiring Connections:
- Use a circuit tester to confirm correct connections.
Controls and Operation:
-
Output (Gain) Control:
- Adjusts the maximum power delivered to the trailer brakes.
- Use the +/- buttons to increase or decrease output.
- Display shows values from 0 to 10 (0 = minimum power, 10 = maximum power).
-
Manual Control:
- Located on the front of the brake control unit.
- Slide the control to manually apply the trailer brakes.
- Use this feature to check or adjust brake performance.
-
Boost Control:
- Provides more aggressive trailer braking.
- Boost levels: b.1, b.2, and b.3.
- Increase or decrease the boost by pressing the Boost Control button.
Setting Power to the Trailer Brakes:
- Connect the trailer to the tow vehicle.
- With the engine running, set the Output/Gain to approximately 5.0.
- Drive at 25 mph on a dry, level surface.
- Apply the Manual Control fully:
- If trailer brakes lock up, decrease power.
- If braking is insufficient, increase power.
- Repeat until braking is smooth and effective, just below wheel lock-up.
Troubleshooting Guide:
| Issue | Cause | Solution |
|---|---|---|
| No display or no response | Power/ground loss | Verify black and white wire connections. |
| Display flashes continuously | Short circuit in trailer brakes | Inspect trailer wiring and connections. |
| Braking power too low | Gain set too low | Increase gain using + button. |
| Intermittent power loss | Loose connection | Inspect all wiring and connections. |
Safety Notes:
- Do not mount the unit at an angle greater than -20° to +70° from level.
- Ensure all wiring connections are secure to avoid braking failures.
- Regularly inspect trailer brakes for wear and proper adjustment.
Technical Support:
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.
