Installation Instructions for Ford LTD, Crown Victoria, Lincoln Town Car, Town Coupe, Mark VI, Mercury Marquis, Grand Marquis, and Mercury Marauder

Part Numbers:

• 44728
• 41116
• 87408

Wiring Access Location:

• PC3, PC4

Tools Required:

• Ratchet
• Torque Wrench
• Drill with 1/2" Drill Bit
• Exhaust Removal Pliers
• Sockets: 3/4", 13mm

Step-by-Step Instructions:

1. Prepare Frame Rails:

   • Examine the bottom of the frame rails and remove any weld spatter to ensure the hitch sits flat.
   • Remove all but a thin film of undercoating from the attaching surfaces.

2. Fishwire Rearward Bolts:

   • Feed the 1/2" carriage bolts and 1/4" x 1-1/2" x 3" spacer blocks through the body mount access holes and into the existing slots in the frame rails.

3. Position Hitch:

   • Raise the hitch into position over the bolts and loosely install the conical washers (teeth side facing hitch) and hex nuts.
   • Ensure both sides of the hitch are positioned identically within the slots (e.g., forward, centered, or rearward).

4. Relocate Exhaust Hanger (2003 and Later Lincoln Town Car):

   • Unbolt the passenger-side exhaust hanger bracket from the vehicle frame.
   • Remove the rubber hanger from both the hanger bracket and the tailpipe bracket.
   • Rotate the rubber hanger and reattach it to the hanger bracket. Do not reattach it to the tailpipe bracket at this time. Discard the existing hanger bolt.

5. Drill Frame Holes:

   • Using the hitch as a template, drill a rearward hole into the bottom of each frame rail with a 1/2" drill bit.

6. Install Rearward Fasteners:

   • Drop a 1/2" bolt with a 1/4" x 1-1/2" x 2" spacer block down through the access hole at the end of each frame rail and into the drilled holes.
   • Hold the spacer block in place with one hand while guiding the bolt through the hole.

7. Secure Hitch:

   • Tighten all 1/2"-13 GR5 fasteners to 75 lb-ft (102 N*m).
   • Tighten all M8 CL8.8 fasteners to 20 lb-ft (27 N*m).

8. Reattach Exhaust Hanger (2003 and Later Lincoln Town Car):

   • Reattach the passenger-side exhaust hanger bracket as shown in Figure 3.

Torque Specifications:

• 1/2"-13 GR5 bolts: 75 lb-ft (102 N*m)
• M8 CL8.8 bolts: 20 lb-ft (27 N*m)

Hardware List:

• (4) Carriage Bolts, 1/2"-13 x 1.75" GR5
• (4) Spacer Blocks, 1/4" x 1-1/2" x 3"
• (2) Spacer Blocks, 1/4" x 1-1/2" x 2"
• (2) Conical Washers, 1/2"
• (4) Hex Nuts, 1/2"-13
• (1) Hex Bolt, M8 x

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:

1. Disconnect and isolate the vehicle's negative battery terminal.
   • Warning: Read and follow all warnings and instructions on the tow vehicle's battery.
2. 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:

1. 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.
2. 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.
3. 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:

1. Secure the harness with cable ties provided to prevent damage or rattling.
2. Reconnect the vehicle's negative battery cable.
3. Insert the 15 amp fuse into the fuse holder and close the cap.
4. 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.