50 Trans Brake Wiring Diagram

Adding Transbrake Control to your Sniper EFI System
Adding Transbrake Control to your Sniper EFI System from www.efisystempro.com

Trans Brake Wiring Diagram


Trans brake wiring is an essential part of a high-performance racing vehicle, allowing the driver to lock the transmission in place while still keeping the engine running. This feature is commonly used in drag racing to achieve quicker and more consistent launches. In this article, we will provide you with a detailed wiring diagram for a trans brake, along with step-by-step instructions and tips to ensure a successful installation.

Understanding the Basics

Before we dive into the wiring diagram, let's first understand the basic components of a trans brake system. A trans brake consists of a solenoid valve, a button or switch, and various wiring connections. When the button is pressed, it energizes the solenoid valve, which in turn redirects the hydraulic pressure to lock the transmission in place while keeping the engine running.

Materials Needed

Before you start the wiring process, make sure you have the following materials:

  • Trans brake solenoid valve
  • Trans brake button or switch
  • 12-volt power source
  • Relay
  • Fuse holder and fuse
  • Wire connectors
  • Wire strippers and crimpers
  • Electrical tape

Wiring Diagram

Now let's take a look at the wiring diagram for a trans brake:

Step-by-Step Instructions

Step 1: Disconnect the Battery

Before starting any electrical work, it's important to disconnect the negative terminal of your vehicle's battery to prevent any accidental short circuits.

Step 2: Mount the Trans Brake Solenoid Valve

Find a suitable location to mount the trans brake solenoid valve near the transmission. Make sure it is securely fastened and won't interfere with any moving parts.

Step 3: Connect the Solenoid Valve

Using the appropriate wire connectors, connect one wire from the solenoid valve to a 12-volt power source. Connect the other wire to the trans brake button or switch.

Step 4: Mount the Trans Brake Button or Switch

Choose a convenient location to mount the trans brake button or switch within reach of the driver. Ensure it is securely mounted and won't obstruct any other controls.

Step 5: Connect the Button or Switch

Connect one wire from the trans brake button or switch to the remaining wire of the solenoid valve. Connect the other wire to a 12-volt power source.

Step 6: Install the Relay

Insert the relay into the wiring circuit to provide a separate power source for the solenoid valve. Connect the relay's coil to a 12-volt power source and ground. Connect the relay's contacts to the solenoid valve and the button or switch.

Step 7: Install the Fuse Holder

Install a fuse holder in-line with the power supply to protect the wiring and components from any electrical faults. Choose an appropriate fuse rating based on the current requirements of your trans brake system.

Step 8: Connect the Power Source

Connect the 12-volt power source to the relay and fuse holder. Ensure all connections are secure and properly insulated.

Step 9: Test the Wiring

Before finalizing the installation, it is crucial to test the wiring connections to ensure everything is working correctly. Activate the trans brake button or switch and listen for the solenoid valve's clicking sound.

Step 10: Finalize the Installation

Once you have confirmed that the trans brake system is functioning properly, secure all the wiring connections with wire ties and electrical tape. Double-check all the connections and make sure there are no loose wires.

Tips and Precautions

Tip 1: Consult the Manufacturer's Instructions

Always refer to the specific wiring diagram and instructions provided by the manufacturer of your trans brake solenoid valve and button or switch. They may have specific requirements or recommendations that differ from the general guidelines.

Tip 2: Use Proper Wire Gauge

Ensure you are using the appropriate wire gauge for the current requirements of your trans brake system. Using wires that are too thin can lead to voltage drops and overheating.

Tip 3: Protect the Wiring

Protect the wiring connections from moisture, vibrations, and other potential hazards. Secure them away from hot engine components and sharp edges to prevent any damage.

Precaution: Safety First

Always prioritize safety when working on your vehicle's electrical system. Wear protective gloves and eyewear, and be cautious of any sharp edges or hot surfaces. If you are unsure about any step, consult a professional.


A properly installed and wired trans brake system can greatly enhance the performance of your racing vehicle. By following the wiring diagram and step-by-step instructions provided in this article, you can confidently install a trans brake and enjoy improved launches and consistent performance on the drag strip.