Trailer Brake Control for 03‑09 Lexus GX470 03‑07 Lexus LX470 w/ Plug Play Wiring Adapter Reese Brakeman IV Eletric Trailer Brakes Module Box Controller
Model: 83504 3040Brake Control Unit
Mounting hardware and bracket
Vehicle specific Plug and Play Wiring Adapter
Fits The Following Vehicles
2003 - 2009 Lexus GX470, All Styles
2003 - 2007 Lexus LX470, All Styles
Brake Control Specs:
| Part Number | 83504 |
| Brand | Reese |
| Type | Time Actuated |
| Axles | 1 to 4 axle trailers |
| Warranty | Lifetime |
| Features: | Digital output indicator Small, compact design Up-front push buttons for Sync and Output Diagnostics for Overload, Open Ground Short Circuit Protected Mounts in any direction No leveling required |
| Installation Instructions |  |
2-Plug Wiring Adapter Specs:
| Part Number | 3040 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions | |
Thank you for choosing Reese made by same people that brought you Tekonsha and Draw-Tite the most powerful manufacturers of electric trailer brake control systems. Our brake controls easily install on your vehicle. The custom 2-Plug adapter wiring which included in this purchase will simply plug into the back of the brake control and the other end plugs into a matching connection point on your vehicle. There is no splicing or extra work involved, it is a very easy process. All parts in our store are sold at a discount. If you have any questions please do not hesitate to give us a call at 702-374-8999. We will match or beat anyones price.
Partial list of fitment years: 03 04 05 06 07 08 09 2003 2004 2005 2006 2007 2008 2009
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Product Details
- Brand: Reese
- Model: 83504 3040
- Includes: Brakeman IV Trailer Times Brake Controller 1 to 4 Axles, Trailer Brake Controller Custom Harness
Compatibility Chart
Description
Brake Control Unit
Mounting hardware and bracket
Vehicle specific Plug and Play Wiring Adapter
Fits The Following Vehicles
2003 - 2009 Lexus GX470, All Styles
2003 - 2007 Lexus LX470, All Styles
Brake Control Specs:
| Part Number | 83504 |
| Brand | Reese |
| Type | Time Actuated |
| Axles | 1 to 4 axle trailers |
| Warranty | Lifetime |
| Features: | Digital output indicator Small, compact design Up-front push buttons for Sync and Output Diagnostics for Overload, Open Ground Short Circuit Protected Mounts in any direction No leveling required |
| Installation Instructions | |
2-Plug Wiring Adapter Specs:
| Part Number | 3040 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions | |
Thank you for choosing Reese made by same people that brought you Tekonsha and Draw-Tite the most powerful manufacturers of electric trailer brake control systems. Our brake controls easily install on your vehicle. The custom 2-Plug adapter wiring which included in this purchase will simply plug into the back of the brake control and the other end plugs into a matching connection point on your vehicle. There is no splicing or extra work involved, it is a very easy process. All parts in our store are sold at a discount. If you have any questions please do not hesitate to give us a call at 702-374-8999. We will match or beat anyones price.
Partial list of fitment years: 03 04 05 06 07 08 09 2003 2004 2005 2006 2007 2008 2009
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Trailer Brake Control for 03-09 Lexus GX470 03-07 Lexus LX470 w/ Plug Play Wiring Adapter Reese Brakeman IV Eletric Trailer Brakes Module Box Controller 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 for 2, 4, 6 & 8 Brake Applications
Product Information:
- Part Number: N83504
Package Contents:
- Brake Control Unit
- Mounting Bracket
- Mounting Screws (#6 x 3/8") (Qty: 4)
Tools Required:
- Drill with 1/8" drill bit
- Screwdriver or 1/4" Nut Driver
- Wire Stripper/Cutter
- Wire Crimping Tool
- Circuit Tester
- Assorted Wrenches
Mounting Instructions:
-
Choose Mounting Location:
- Select a solid surface that is easy for the driver to access.
- Ensure the area behind the mounting location is clear.
-
Install the Bracket:
- Use the bracket as a template to mark the holes.
- Drill two (2) 1/8" holes at the marked locations.
- Secure the bracket with self-tapping screws.
-
Attach the Brake Control:
- Slide the Brake Control Unit into the bracket.
- Secure it with the remaining screws.
Wiring Instructions:
- Black Wire: Connect to the 12V positive terminal of the battery using a 30A auto-reset circuit breaker.
- White Wire: Connect to a clean, bare metal ground on the vehicle chassis.
- Red Wire: Connect to the cold side of the stoplight switch (voltage only when the brake pedal is pressed).
- Blue Wire: Connect to the trailer brake wire at the 7-way connector.
Control Functions:
-
Output (Gain) Control:
- Adjusts the maximum power sent to the trailer brakes.
- Range: 0 (minimum) to 10 (maximum).
-
Sync Control:
- Adjusts the aggressiveness of the trailer braking:
- Press + for more aggressive braking.
- Press – for less aggressive braking.
- Sync settings range from 0° to 9°.
- Adjusts the aggressiveness of the trailer braking:
-
Manual Slide Control:
- Applies the trailer brakes independently of the tow vehicle’s brakes.
- Slide the control to the left to activate the trailer brakes.
- The Output (Gain) setting determines braking force.
-
Digital Display:
- Displays Gain and Sync settings during setup and operation.
- Decimal Point indicates activation when the brake pedal is pressed.
Setup and Adjustment:
-
Preliminary Adjustment:
- Connect the trailer to the vehicle.
- Press and hold the brake pedal.
- Adjust the Output (Gain) to approximately 2.0 using the +/- buttons.
- Press either Sync + or Sync – to adjust the Sync setting to 4°.
-
Test Drive:
- Drive forward at 25 mph in an open area.
- Use the Manual Slide Control to apply the trailer brakes:
- If braking is weak, increase the Output (Gain) setting.
- If the trailer brakes lock up, reduce the Output (Gain) setting.
-
Fine-Tune Sync Setting:
- Press and hold the brake pedal and adjust Sync:
- + for more aggressive braking.
- – for smoother braking.
- Make multiple stops to ensure smooth and firm braking performance.
- Press and hold the brake pedal and adjust Sync:
Troubleshooting Guide:
| Condition | Possible Cause | Solution |
|---|---|---|
| No brakes with pedal or manual use | No power or ground connection | Verify Black and White wires. |
| Weak braking performance | Output set too low | Increase the Output (Gain). |
| Brakes lock up | Output set too high | Decrease the Output (Gain). |
| Flashing OL on Display | Short in Blue wire circuit | Inspect and repair Blue wire circuit. |
| No display or response | Faulty wiring or blown fuse | Verify all wiring and connections. |
Safety Notes:
- Ensure wiring connections are secure and properly insulated.
- Test the system before towing and regularly inspect the trailer brakes.
- Do not exceed the vehicle’s towing capacity as specified by the manufacturer.
Technical Support:
- For technical support and assistance, our team of experts is available to help.
- Visit www.trailerjacks.com or call 877-869-6690.
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.
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