Compatibility Chart:
Get Expert Help
Install Notes
Installation Instructions for Audi Q5 and Porsche Macan
Part Numbers:
- 75940
- 44755
- 87666
- 41580 UH
Tools Required:
- Wrenches: M16 Socket, M10 Socket
- T20, T30, 6” Extension
- Torque Wrench
- Trim Panel Tool
- Dremel (or similar cutting tool)
Weight Capacities:
- Weight Carrying (Ball Mount):
- Max Gross Trailer Weight: 5,000 lbs (2,270 kg)
- Max Tongue Weight: 750 lbs (340 kg)
Wiring Access Location:
- SUV1, SUV2
Torque Specifications:
- Tighten all M10 CL10.9 fasteners to 44 lb-ft (60 N·m)
- Tighten all M6 CL8.8 fasteners to 7 lb-ft (9.5 N·m)
- Tighten all T30 Torx screws to 3 lb-ft (4 N·m)
- Tighten all T20 Torx screws to 1.1 lb-ft (1.5 N·m)
Step-by-Step Instructions:
-
Remove Interior Components:
- Open liftgate and remove rear cargo flooring.
- Use a trim panel tool to unclip and remove the scuff plate, then disconnect the electrical plug beneath it.
- Remove two 10mm nuts from the recessed bumper fascia studs under the scuff plate.
- Remove four fastening rings (two on each side) using a T30 socket.
- Detach the side rails on both sides.
- Remove the driver-side interior panel, spare tire air compressor, and Styrofoam platform.
-
Detach Passenger Side Components:
- Remove the passenger-side interior panel and lower fuse box with a 10mm socket.
- Remove 10mm nuts from the bumper fascia studs inside the compartment.
-
Remove Bumper Fascia:
- Remove four Torx screws from each wheel well and two screws from underneath the vehicle attaching the fascia to the trunk pan.
- Carefully pull off the bumper fascia, starting at the wheel wells. Unplug all electrical connections (lights and sensors) from the fascia.
- Remove and safely store the entire wire harness from behind the bumper fascia.
-
Remove and Replace Rear Retainer Brackets:
- Use a 16mm socket and a 6” extension to remove two 10mm bolts from each rear retainer bracket.
- Remove and discard the aluminum bumper, then insert the hitch brackets into the sleeves previously occupied by the aluminum bumper.
- Align the hitch bracket slots with the retainer bracket holes and reinstall using existing vehicle fasteners. Torque bolts to 44 lb-ft (60 N·m).
-
Trim Fascia:
- Mark and cut a rectangle measuring 6 1/4" tall by 3 3/4" wide at the centerline of the fascia for hitch clearance. Ensure accuracy to avoid damaging the fascia.
-
Reinstall Components:
- Reverse the steps above to reinstall the fascia, wire harness, and all removed components. Ensure all fasteners are torqued to the specified values.
Safety Notes:
- Regularly check all fasteners to ensure the hitch remains secure.
- Plug all holes in the trunk pan or body panels to prevent water and exhaust fume entry.
- Replace any damaged hitch or ball immediately.
- Wear safety glasses and follow precautions when working under the vehicle.
- Do not cut access or attachment holes with a torch.
Specifications:
- Hitch Type: Class III
- Compliance: This product meets safety standards as per V.E.S.C. Regulation V-5 and SAE J684.
Note: Obtain the owner's permission before cutting the fascia. Always adhere to the towing vehicle manufacturer’s weight rating or the hitch’s maximum load rating, whichever is lower.
Installation Instructions for Modulite® HD Protector Vehicle Wiring
Part Number:
- 119148
Tools Required:
- Phillips Head #2 Screwdriver
- Wire Cutters
- Wire Strippers/Wire Crimpers
- Tester or Volt Meter
- Socket & Ratchet Set
- Drill with 3/32” Drill Bit
- Double-Sided Tape
Step-by-Step Instructions:
Tow Vehicle Inputs - Determination:
- Disconnect and isolate the vehicle's negative battery terminal.
- Warning: Read and follow all warnings and instructions on the tow vehicle's battery.
- Splice the tow harness input wires to the vehicle as determined.
- Caution: Use appropriate gauge wire splices. Blue taps are for 16-18 gauge wires only.
Harness Installation:
- Determine the mounting location of the module and secure it using the double-sided tape provided.
- Warning: Mount the module with the epoxy side pointed towards the ground to prevent water buildup.
- Locate a suitable grounding point near the module, such as an existing ground stud, or drill a 3/32” hole to secure the white wire using the provided eyelet and screw.
- Caution: Verify what is behind any surface before drilling to avoid damage or personal injury.
- Route the power wire to the vehicle’s positive battery terminal. Use the provided fuse holder, butt connector, and ring terminal to connect to the battery.
- Do not insert the 15 amp fuse yet.
- Caution: Ensure the module is connected to a constant power source and avoid routing the wire near hot pipes, heat shields, fuel tanks, or pinch points.
Completion:
- Secure the harness with cable ties provided to prevent damage or rattling.
- Reconnect the vehicle's negative battery cable.
- Insert the 15 amp fuse into the fuse holder and close the cap.
- Test the installation using a test light or trailer. Check each function independently and in combination.
Hardware List:
- 8 × Cable Ties, 8.5”
- 1 × 15 AMP Fuse
- 2 × Ring Terminals
- 1 × Fuse Holder
- 2 × Yellow Butt Connectors
- 1 × Self-Tapping Screw
- 4 × Blue Taps
- 1 × Spade Terminal
Wiring Outputs:
- White Wire: Ground
- Brown Wire: Tail
- Yellow Wire: Left Turn/Brake
- Green Wire: Right Turn/Brake
- Red Wire: Stop (for 3-wire systems only)
Safety Notes:
- Always read and follow all warnings and instructions included with the product and the vehicle's manual.
- Do not exceed the manufacturer’s towing capacity or the product’s amperage ratings.
- Wear safety glasses and use all necessary safety precautions during installation.
Troubleshooting Guide:
- 4-Flat Not Functioning: Ensure input wires are correctly installed and repeat testing after removing the 15 amp fuse for 10 seconds.
- No Power to 4-Flat: Check the chassis ground and ensure the module is properly connected to a constant power source.
Specifications:
- Installation Time: Approximately 45 minutes
- Compatibility: Does not work with multiplex vehicles (BM, BT, or BTT). Use part numbers 119190 or 119250 for these systems.
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 warranty information, 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.