Product Details
- Brand: Curt
- Model: 56209 57672 51500 58361-CW3385
- Includes: Custom Wiring Harness, Dual-Output Electrical Adapter, Trailer Brake Controller Wiring Kit, 30-Amp Universal Circuit Breaker
Compatibility Chart
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For 2014-2024 Ram ProMaster 3500 Trailer Wiring 7 Way Trailer Wiring Plug w/ Bracket Fits All Models Curt Install Notes
Installation Instructions for Ram ProMaster
Part Numbers:
- 56209
Wiring Access Location:
- S3: Behind driver side rear access panel
- S4: Behind passenger side rear access panel
Tools Required:
- Flat blade screwdriver
- Phillips screwdriver
Step-by-Step Instructions:
Step 1: Locate and Disconnect the Battery
- Locate the vehicle battery under the driver-side floor panel.
- Turn the six fasteners securing the floor panel to remove it.
- Disconnect the negative battery terminal to ensure safety while working on the vehicle's electrical system.
Step 2: Access the Driver-Side Taillight Wiring Harness
- Open the rear cargo doors.
- Remove the seven Phillips screws from the plastic cover on the driver side to expose the taillight wiring harness connectors.
- Carefully separate the connectors from the taillight housing, taking care not to damage the locking tabs.
Step 3: Install the Custom Wiring Harness (Driver Side)
- Take the custom wiring harness end with the yellow wire.
- Insert it between the separated connectors on the driver side.
- Ensure the connectors are fully inserted and the locking tabs are securely in place.
Step 4: Secure the Ground Wire
- Locate a suitable grounding point near the connectors, such as an existing screw with a nut in the vehicle frame.
- If necessary, drill a 3/32" pilot hole into a clean, rust-free, and paint-free area.
- Secure the white ground wire using the provided ring terminal and screw.
Safety Note: Before drilling, inspect the area to ensure no components are hidden behind or beneath the surface to avoid damage or injury.
Step 5: Install the Wiring Harness on the Passenger Side
- Route the custom wiring harness end with the green wire to the passenger side through the opening that runs up and over the rear cargo doors.
- Follow Steps 2–3 on the passenger side to connect the harness to the taillight wiring.
Step 6: Mount the Converter Box
- Inside the vehicle on the driver side, locate a flat spot on the upper corner inside the rear cargo door frame.
- Use the provided double-sided tape to securely adhere the black converter box to this location.
Step 7: Remove Trim Panels to Route Power Wire
- Starting on the back side of the driver seat, remove the Phillips screws securing the plastic seat belt trim panel.
- Remove all plastic trim panels around the driver-side seat and floor, including those at the seat base and floor edges, to expose the wiring path.
Step 8: Route the Power Wire to the Battery
- Route the black power wire from the converter box along the top of the driver-side cargo area.
- Guide the wire down along the frame behind the driver seat and continue routing it beneath the seat.
- Secure the wire along the bottom of the driver-side seat frame, ensuring it avoids sharp edges and moving parts.
- Pass the wire under the floor panel section and connect it to the battery.
Note: Refer to the included CME-PCL-INS sheet for a visual guide on routing the power wire.
Step 9: Position the 4-Flat Connector
- When in use, route the 4-flat connector to the center of the vehicle for trailer connection.
- When not in use, roll up the connector and store it in a secure, out-of-the-way location inside the cargo area.
- Use the provided cable ties to secure any loose wires.
Step 10: Finalize Installation
- Reinstall all removed trim panels, covers, and components.
- Reconnect the negative battery terminal to restore the vehicle’s electrical system.
- Install the provided 4-flat dust cover to protect the connector from dirt and corrosion.
Hardware List:
- White ground wire with ring terminal
- Black converter box with double-sided tape
- 4-flat wiring harness
- Cable ties (provided)
Safety Notes:
- Always check for hidden components behind or beneath surfaces before drilling to avoid damage or injury.
- Disconnect the negative battery cable before working on the electrical system.
- Ensure the battery connection is fuse-protected (maximum 10 amps). Exceeding the rating can lead to overheating, fire, or voided warranty.
Specifications:
- Signal Circuits: 7.5 amps per side
- Tail/Running Circuits: 7.5 amps total
- This system is compatible with 12-volt negative ground systems only.
Installation Instructions for Ram ProMaster
Part Numbers:
- 56209
Wiring Access Location:
- S3: Behind driver side rear access panel
- S4: Behind passenger side rear access panel
Tools Required:
- Flat blade screwdriver
- Phillips screwdriver
Step-by-Step Instructions:
Step 1: Locate and Disconnect the Battery
- Locate the vehicle battery under the driver-side floor panel.
- Turn the six fasteners securing the floor panel to remove it.
- Disconnect the negative battery terminal to ensure safety while working on the vehicle's electrical system.
Step 2: Access the Driver-Side Taillight Wiring Harness
- Open the rear cargo doors.
- Remove the seven Phillips screws from the plastic cover on the driver side to expose the taillight wiring harness connectors.
- Carefully separate the connectors from the taillight housing, taking care not to damage the locking tabs.
Step 3: Install the Custom Wiring Harness (Driver Side)
- Take the custom wiring harness end with the yellow wire.
- Insert it between the separated connectors on the driver side.
- Ensure the connectors are fully inserted and the locking tabs are securely in place.
Step 4: Secure the Ground Wire
- Locate a suitable grounding point near the connectors, such as an existing screw with a nut in the vehicle frame.
- If necessary, drill a 3/32" pilot hole into a clean, rust-free, and paint-free area.
- Secure the white ground wire using the provided ring terminal and screw.
Safety Note: Before drilling, inspect the area to ensure no components are hidden behind or beneath the surface to avoid damage or injury.
Step 5: Install the Wiring Harness on the Passenger Side
- Route the custom wiring harness end with the green wire to the passenger side through the opening that runs up and over the rear cargo doors.
- Follow Steps 2–3 on the passenger side to connect the harness to the taillight wiring.
Step 6: Mount the Converter Box
- Inside the vehicle on the driver side, locate a flat spot on the upper corner inside the rear cargo door frame.
- Use the provided double-sided tape to securely adhere the black converter box to this location.
Step 7: Remove Trim Panels to Route Power Wire
- Starting on the back side of the driver seat, remove the Phillips screws securing the plastic seat belt trim panel.
- Remove all plastic trim panels around the driver-side seat and floor, including those at the seat base and floor edges, to expose the wiring path.
Step 8: Route the Power Wire to the Battery
- Route the black power wire from the converter box along the top of the driver-side cargo area.
- Guide the wire down along the frame behind the driver seat and continue routing it beneath the seat.
- Secure the wire along the bottom of the driver-side seat frame, ensuring it avoids sharp edges and moving parts.
- Pass the wire under the floor panel section and connect it to the battery.
Note: Refer to the included CME-PCL-INS sheet for a visual guide on routing the power wire.
Step 9: Position the 4-Flat Connector
- When in use, route the 4-flat connector to the center of the vehicle for trailer connection.
- When not in use, roll up the connector and store it in a secure, out-of-the-way location inside the cargo area.
- Use the provided cable ties to secure any loose wires.
Step 10: Finalize Installation
- Reinstall all removed trim panels, covers, and components.
- Reconnect the negative battery terminal to restore the vehicle’s electrical system.
- Install the provided 4-flat dust cover to protect the connector from dirt and corrosion.
Hardware List:
- White ground wire with ring terminal
- Black converter box with double-sided tape
- 4-flat wiring harness
- Cable ties (provided)
Safety Notes:
- Always check for hidden components behind or beneath surfaces before drilling to avoid damage or injury.
- Disconnect the negative battery cable before working on the electrical system.
- Ensure the battery connection is fuse-protected (maximum 10 amps). Exceeding the rating can lead to overheating, fire, or voided warranty.
Specifications:
- Signal Circuits: 7.5 amps per side
- Tail/Running Circuits: 7.5 amps total
- This system is compatible with 12-volt negative ground systems only.
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.
For complete warranty instructions, please download the full installation PDF.
Installation Instructions for 4-Way to 7-Way Adapter and Brake Control Wiring
Tools Required:
- Phillips Head Screwdriver
- Drill with 3/32" Drill Bit
- 10mm Socket & Ratchet or Wrench
- Wire Crimpers
- Wire Cutters
- Test Light or Multimeter
- Cable Ties
Part 1: Install the 4-Way to 7-Way Adapter
Step-by-Step Instructions:
-
Mount the Adapter:
- Choose a suitable mounting point on the vehicle, typically near the hitch.
- Use the provided bracket and screws to secure the adapter.
-
Connect the 4-Flat Plug:
- Plug the 4-flat connector on the adapter into the existing 4-flat plug on the vehicle.
- This connection enables tail lights, left turn, and right turn signals.
-
Ground the Adapter:
- Locate a clean, solid grounding point near the adapter.
- Drill a 3/32" hole if necessary and secure the white ground wire from the adapter using the provided screw and eyelet.
-
Leave Additional Wires Disconnected:
- The following wires will remain disconnected until Part 2:
- Black Wire: Power from the battery.
- Blue Wire: Brake control output.
- Yellow Wire: Reverse light (optional; leave disconnected unless needed).
- The following wires will remain disconnected until Part 2:
-
Test Initial Connection:
- Use a test light or trailer to verify functionality of the 4-way connections (tail lights, turn signals).
Part 2: Install Brake Control Wiring
Step-by-Step Instructions:
-
Mount Circuit Breakers:
- Install two 30A circuit breakers on the firewall or another suitable location near the battery.
- Use self-tapping screws to mount them securely.
-
Route Power Wires:
- Connect the black 12-gauge wire from the 7-way adapter to the auxiliary side of one circuit breaker (this powers the 7-way socket).
- Run a heavy-gauge wire from the battery's positive terminal to the battery side of this circuit breaker, using a ring terminal.
- Run another heavy-gauge wire from the battery's positive terminal to the auxiliary side of the second circuit breaker (for the brake controller).
-
Install the Brake Controller:
- Mount the brake controller under the dash on a firm surface.
- Use the following connections:
- Red Wire: Connect to the cold side of the brake switch (active only when the brake pedal is pressed).
- Blue Wire: Connect to the blue wire on the 7-way adapter for trailer brakes.
- White Wire: Connect to a solid ground point on the vehicle body.
- Black Wire: Connect to the auxiliary side of the second 30A circuit breaker (provides power to the brake controller).
-
Optional: Connect Reverse Light Circuit:
- If the trailer has a reverse light circuit, connect the yellow wire from the 7-way adapter to the vehicle’s reverse light circuit.
-
Reconnect the Battery:
- Reattach the negative battery cable and ensure all connections are secure.
- Insert the fuses into both circuit breakers.
-
Secure All Wires:
- Use cable ties to secure all loose wires and prevent damage or rattling.
-
Test the System:
- Verify functionality of all circuits (running lights, turn signals, brake lights, and brake controller output).
- If applicable, test the reverse light circuit.
Notes:
- Most installations will only require connecting the black and blue wires from the 7-way adapter.
- Leave the yellow wire disconnected unless the trailer has a reverse light or surge brake lockout circuit.
- Always adhere to safety guidelines and verify all connections before use.
Warning: Incorrect wiring can cause damage to the vehicle or trailer. Test all connections carefully before use.
Installation Instructions for 4-Way to 7-Way Adapter and Brake Control Wiring
Tools Required:
- Phillips Head Screwdriver
- Drill with 3/32" Drill Bit
- 10mm Socket & Ratchet or Wrench
- Wire Crimpers
- Wire Cutters
- Test Light or Multimeter
- Cable Ties
Part 1: Install the 4-Way to 7-Way Adapter
Step-by-Step Instructions:
-
Mount the Adapter:
- Choose a suitable mounting point on the vehicle, typically near the hitch.
- Use the provided bracket and screws to secure the adapter.
-
Connect the 4-Flat Plug:
- Plug the 4-flat connector on the adapter into the existing 4-flat plug on the vehicle.
- This connection enables tail lights, left turn, and right turn signals.
-
Ground the Adapter:
- Locate a clean, solid grounding point near the adapter.
- Drill a 3/32" hole if necessary and secure the white ground wire from the adapter using the provided screw and eyelet.
-
Leave Additional Wires Disconnected:
- The following wires will remain disconnected until Part 2:
- Black Wire: Power from the battery.
- Blue Wire: Brake control output.
- Yellow Wire: Reverse light (optional; leave disconnected unless needed).
- The following wires will remain disconnected until Part 2:
-
Test Initial Connection:
- Use a test light or trailer to verify functionality of the 4-way connections (tail lights, turn signals).
Part 2: Install Brake Control Wiring
Step-by-Step Instructions:
-
Mount Circuit Breakers:
- Install two 30A circuit breakers on the firewall or another suitable location near the battery.
- Use self-tapping screws to mount them securely.
-
Route Power Wires:
- Connect the black 12-gauge wire from the 7-way adapter to the auxiliary side of one circuit breaker (this powers the 7-way socket).
- Run a heavy-gauge wire from the battery's positive terminal to the battery side of this circuit breaker, using a ring terminal.
- Run another heavy-gauge wire from the battery's positive terminal to the auxiliary side of the second circuit breaker (for the brake controller).
-
Install the Brake Controller:
- Mount the brake controller under the dash on a firm surface.
- Use the following connections:
- Red Wire: Connect to the cold side of the brake switch (active only when the brake pedal is pressed).
- Blue Wire: Connect to the blue wire on the 7-way adapter for trailer brakes.
- White Wire: Connect to a solid ground point on the vehicle body.
- Black Wire: Connect to the auxiliary side of the second 30A circuit breaker (provides power to the brake controller).
-
Optional: Connect Reverse Light Circuit:
- If the trailer has a reverse light circuit, connect the yellow wire from the 7-way adapter to the vehicle’s reverse light circuit.
-
Reconnect the Battery:
- Reattach the negative battery cable and ensure all connections are secure.
- Insert the fuses into both circuit breakers.
-
Secure All Wires:
- Use cable ties to secure all loose wires and prevent damage or rattling.
-
Test the System:
- Verify functionality of all circuits (running lights, turn signals, brake lights, and brake controller output).
- If applicable, test the reverse light circuit.
Notes:
- Most installations will only require connecting the black and blue wires from the 7-way adapter.
- Leave the yellow wire disconnected unless the trailer has a reverse light or surge brake lockout circuit.
- Always adhere to safety guidelines and verify all connections before use.
Warning: Incorrect wiring can cause damage to the vehicle or trailer. Test all connections carefully before use.
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.
Warranty Information:
For complete warranty instructions, please download the full installation PDF.
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.