Installation Instructions for GM Full Size Van

Part Numbers:

• 75189
• 87189
• 44028

Wiring Access Location:

• SUV3, SUV4

Tools Required:

• Wrenches: 3/4", 7/8" (tighten all fasteners with torque wrench)

Drill Bits:

• None

Notes:

• Hitch requires 5/8" pin and clip if stabilizing pin is not installed.

Step-by-Step Instructions:

1. Insert carriage bolts and blocks through existing access slots and into attachment holes as shown in the diagram for each side.
2. Raise the hitch into position and fasten with conical toothed washers and nuts as shown in the diagram for each side.
3. Tighten all 1/2” GR5 fasteners to 75 lb-ft (102 N·m).

Hardware List:

• (4) 1/2-13 x 1-3/4 GR5 Carriage Bolts
• (2) 1/4 x 1-1/2 x 3 Blocks (1711)
• (2) 1/4 x 1-1/2 x 2 Blocks (1540)
• (4) Conical Toothed Washers
• (4) Nuts

Safety Notes:

• Check the hitch frequently to ensure all fasteners and the ball are properly tightened.
• If the hitch is removed, plug all holes in the trunk pan or other body panels to prevent water and exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Follow safety precautions when working beneath the vehicle, and wear eye protection.
• Do not cut access or attachment holes with a torch.

Specifications:

• Hitch Type and Weight Ratings:
  • Weight Distributing: Max Trailer Weight 7,500 lbs, Max Tongue Weight 750 lbs.
  • Weight Carrying (Ball Mount): Max Trailer Weight 5,000 lbs, Max Tongue Weight 500 lbs.
• Complies with safety specifications and requirements for connecting devices and towing systems of the State of New York, V.E.S.C. Regulation V-5, and SAE J684.

Installation Instructions for GM Full Size Van

Part Numbers:

• 75189
• 87189
• 44028

Wiring Access Location:

• SUV3, SUV4

Tools Required:

• Wrenches: 3/4", 7/8" (tighten all fasteners with torque wrench)

Drill Bits:

• None

Notes:

• Hitch requires 5/8" pin and clip if stabilizing pin is not installed.

Step-by-Step Instructions:

1. Insert carriage bolts and blocks through existing access slots and into attachment holes as shown in the diagram for each side.
2. Raise the hitch into position and fasten with conical toothed washers and nuts as shown in the diagram for each side.
3. Tighten all 1/2” GR5 fasteners to 75 lb-ft (102 N·m).

Hardware List:

• (4) 1/2-13 x 1-3/4 GR5 Carriage Bolts
• (2) 1/4 x 1-1/2 x 3 Blocks (1711)
• (2) 1/4 x 1-1/2 x 2 Blocks (1540)
• (4) Conical Toothed Washers
• (4) Nuts

Safety Notes:

• Check the hitch frequently to ensure all fasteners and the ball are properly tightened.
• If the hitch is removed, plug all holes in the trunk pan or other body panels to prevent water and exhaust fumes from entering.
• Replace any damaged hitch or ball immediately.
• Follow safety precautions when working beneath the vehicle, and wear eye protection.
• Do not cut access or attachment holes with a torch.

Specifications:

• Hitch Type and Weight Ratings:
  • Weight Distributing: Max Trailer Weight 7,500 lbs, Max Tongue Weight 750 lbs.
  • Weight Carrying (Ball Mount): Max Trailer Weight 5,000 lbs, Max Tongue Weight 500 lbs.
• Complies with safety specifications and requirements for connecting devices and towing systems of the State of New York, V.E.S.C. Regulation V-5, and SAE J684.

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.

Installation Instructions for T-Connector Adapter

Part Numbers:

• 118392

Wiring Access Location:

• Rear taillight wiring harness behind the interior trim panels near the doors.

Tools Required:

• Drill with a 3/32" drill bit.
• Philips head screwdriver.

Step-by-Step Instructions:

1. Access the Taillight Wiring Harness:

   • Remove the rear interior trim panels located near the doors to expose the vehicle’s taillight wiring harness.
   • The harness will have a connection point on both sides matching the T-Connector adapter.

2. Driver’s Side Connection:

   • Disconnect the vehicle’s wiring harness connectors on the driver’s side, being careful not to damage the locking tabs.
   • Plug the T-Connector end with the yellow wire between the mating plugs on the driver’s side taillight socket and the vehicle’s wiring harness. Ensure the connectors are fully inserted and locked using the existing and provided locking tabs.

3. Ground Connection:

   • Locate a suitable grounding point near the connector, such as the vehicle’s frame or cross member.
   • Caution: Do not drill into the vehicle floor or any exposed surfaces. Verify what is behind any surface prior to drilling to avoid damage or injury.
   • Clean the area of dirt and rustproofing, drill a 3/32" hole, and secure the white wire using the provided eyelet and screw.

4. Passenger’s Side Connection:

   • Repeat steps 2 and 3 on the passenger’s side using the T-Connector end with the green wire.

5. Securing the Harness:

   • Tuck the green wire under the floor trim (threshold) panel and secure the wiring with cable ties as needed.

6. Reassembly:

   • Replace all removed trim panels and secure the rear interior of the vehicle.

7. Testing the Installation:

   • Test the installation with a test light or trailer to verify proper functionality. All connections must be complete for the T-Connector to function correctly.

   Specifications:

   • Max. stop/turn light: 1 per side (7.5 amps).
   • Max. tail lights: (7.5 amps).

Hardware List:

• T-Connector adapter.
• Eyelet and screw.
• Cable ties.

Safety Notes:

• Overloading the circuit can cause fires. Do not exceed the towing manufacturer’s rating or the unit specifications.
• Test the installation thoroughly after completing all connections.

Manufacturer Notes:

• Follow all warnings and installation instructions provided.
• Use a test light or trailer to confirm proper installation.
• Refer to the vehicle owner’s manual for additional information.

Installation Instructions for T-Connector Adapter

Part Numbers:

• 118392

Wiring Access Location:

• Rear taillight wiring harness behind the interior trim panels near the doors.

Tools Required:

• Drill with a 3/32" drill bit
• Philips head screwdriver

Step-by-Step Instructions:

1. Access the Taillight Wiring Harness:

   • Remove the rear interior trim panels located near the doors to expose the vehicle’s taillight wiring harness.
   • The harness will have a connection point on both sides matching the T-Connector adapter.

2. Driver’s Side Connection:

   • Disconnect the vehicle’s wiring harness connectors on the driver’s side, being careful not to damage the locking tabs.
   • Plug the T-Connector end with the yellow wire between the mating plugs on the driver’s side taillight socket and the vehicle’s wiring harness.
   • Ensure the connectors are fully inserted and locked using the existing and provided locking tabs.

3. Ground Connection:

   • Locate a suitable grounding point near the connector, such as the vehicle’s frame or cross member.
   • Caution: Do not drill into the vehicle floor or any exposed surfaces. Verify what is behind any surface prior to drilling to avoid damage or injury.
   • Clean the area of dirt and rustproofing, drill a 3/32" hole, and secure the white wire using the provided eyelet and screw.

4. Passenger’s Side Connection:

   • Repeat steps 2 and 3 on the passenger’s side using the T-Connector end with the green wire.

5. Securing the Harness:

   • Tuck the green wire under the floor trim (threshold) panel and secure the wiring with cable ties as needed.

6. Reassembly:

   • Replace all removed trim panels and secure the rear interior of the vehicle.

7. Testing the Installation:

   • Test the installation with a test light or trailer to verify proper functionality.
   • All connections must be complete for the T-Connector to function correctly.

Specifications:

• Max Stop/Turn Light: 7.5 amps per side
• Max Tail Lights: 7.5 amps

Hardware List:

• T-Connector adapter
• Eyelet and screw
• Cable ties

Safety Notes:

• Overloading the circuit can cause fires. Do not exceed the towing manufacturer’s rating or the unit specifications.
• Test the installation thoroughly after completing all connections.

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.

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.

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:

1. 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.

2. 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.

3. 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.

4. 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).

5. 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:

1. 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.

2. 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).

3. 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).

4. 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.

5. Reconnect the Battery:

   • Reattach the negative battery cable and ensure all connections are secure.
   • Insert the fuses into both circuit breakers.

6. Secure All Wires:

   • Use cable ties to secure all loose wires and prevent damage or rattling.

7. 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:

1. 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.

2. 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.

3. 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.

4. 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).

5. 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:

1. 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.

2. 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).

3. 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).

4. 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.

5. Reconnect the Battery:

   • Reattach the negative battery cable and ensure all connections are secure.
   • Insert the fuses into both circuit breakers.

6. Secure All Wires:

   • Use cable ties to secure all loose wires and prevent damage or rattling.

7. 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.