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Your vehicle may be hardwired using the accessories below when a T-One connector is not available.

The wiring system on this vehicle may not be strong enough to support both the vehicle and trailer lights. A powered converter or Modulite is strongly recommended in all cases where the trailer has more than one taillight on each side. Powered converters (Modulites) are spliced into the vehicle's wiring system to get the signal, but the power for the trailer lights is drawn directly from the vehicle battery. This bypasses all the expensive electrical components on the vehicle and reduces the strain on the wiring system. Circuit protection further safeguards the vehicle and the module itself from mis-wired trailers. For more information see our wiring faq page and our table below.

etrailer.com recommends the Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit (# 119176KIT) for your vehicle. If your trailer has a lot of lights, see our chart at the bottom of the page to help select the wiring harness that will work best for your application.

4-Pole 60" Long Vehicle End (Includes 4 wire taps)
Product Code: 18002
Product Price: $7.99
Product Weight: 0.50 pounds
More Information and Pricing

Tow Ready 4 Way Flat Trailer Connector, Vehicle End by Draw-Tite, Hidden Hitch and Reese

  • 18 Gauge Bonded Wires
  • Taillight, Stop and Turn functions printed on wires
  • Ground Wire Runs Full Length Of Assembly
  • 60" Long
Recommended
Wiring Harness Mounting Brackets

Tow Ready # 118002


 
4-Pole 72" Long Vehicle End
Product Code: 18172
Product Price: $5.99
Product Weight: 1.00 pounds
More Information and Pricing
  • 18 Gauge Bonded Wires
  • Taillight, Stop and Turn functions printed on wires
  • Ground Wire Runs Full Length Of Assembly
  • Recommended
    • Wiring Harness Mounting Brackets

 
4-Pole Hardwire Kit Including Circuit Tester
Product Code: 18252
Product Price: $14.91
Product Weight: 2.00 pounds
More Information and Pricing
  • 18 Gauge Bonded Wires
  • Taillight, Stop and Turn Functions Printed On Wires
  • Ground Wire Runs Full Length Of Assembly
  • Includes Circuit Tester
  • Includes 4 Wire Taps
  • Measures 72" Long
Recommended
Wiring Harness Mounting Brackets

 
4-Pole Hardwire Kit with Insulated Butt Connectors
Product Code: 20250
Product Price: $9.99
Product Weight: 1.00 pounds
More Information and Pricing
  • 18 Gauge Bonded Wires
  • Taillight, Stop and Turn Functions Printed On Wires
  • Ground Wire Runs Full Length of Assembly
  • Includes 4 Insulated Butt Connectors
  • Wire leads measure 12" long
Recommended
Wiring Harness Mounting Brackets

Replaces # 18250


 
5-Flat Vehicle End 72" Wiring Harness
Product Code: 20016
Product Price: $8.99
Product Weight: 1.00 pounds
More Information and Pricing

5-Flat electrical wiring connector

Fifth wire added for surge brake lockout circuit which is becoming more common on today's newer boat trailers.

5-Flat wiring Connector will still work with most 4-pole trailer connectors.


 
Modulite Installation Wiring Kit
Product Code: 118151
Product Price: $9.99
Product Weight: 1.00 pounds
More Information and Pricing

Modulite Installation Kit

  • Kit Includes:
    • (1) 10 amp Fuse
    • (1) Fuse Holder
    • (8) Cable Ties
    • (1) Ring Terminal 3/8"
    • (1) Ring Terminal 1/2"
    • (1) Wire, 12 ga. 20'
    • (1) Butt Connector

Wiring installation kit for installing all Modulites. Includes 12 gauge wire and connectors shown.


 
Upgraded Modulite Vehicle Wiring Harness with 4 Pole Trailer Connector
Product Code: 119146
Product Price: $44.95
Product Weight: 1.00 pounds
More Information and Pricing

Tow Ready ModuLite Wiring Harness with Powered Converter by Draw-Tite, Hidden Hitch and Reese



Features:

  • Virtually eliminates draw on the vehicle's taillight circuit
  • Works with either LED or incandescent bulbs on both the trailer and vehicle
  • Works with most vehicles multiplex wiring systems for lighting
  • Taillight circuit has been upgraded to work with vehicles using PWM, allowing converter to turn on fully giving trailer maximum light brightness
  • Powers the trailer's stop, turn, tail and running lights directly from the tow vehicle's battery
  • May be used on 2 and 3 wire systems
    • When used on 2 wire systems, brake wire on harness must be grounded
  • Eliminates the need for a heavy duty flasher
  • Includes integrated protective cover for 4-pole trailer connector
Warning:
Overloading circuit can cause fires. Do not exceed lower of towing manufacturer rating or:
  • Maximum stop/turn light: 1 per side (2.1 amps)
  • Maximum tail lights: (7.5 amps)
Read vehicle's owners manual and instruction sheet for additional information.

119146 ModuLite Wiring Harness with Powered Converter

Replaces Tow Ready 118146


 
Upgraded Modulite Circuit Protected Vehicle Wiring Harness with 4 Pole Trailer Connector
Product Code: 119176
Product Price: $49.95
Product Weight: 1.00 pounds
More Information and Pricing

Tow Ready Circuit Protected ModuLite Vehicle Wiring Harness by Draw-Tite, Hidden Hitch and Reese


Features:

  • Short circuit protection safeguards itself and the tow vehicle against harmful electrical shorts and mis-wire situations
  • Virtually eliminates draw on the vehicle's taillight circuit
  • Taillight circuit has been upgraded to work with vehicles using Pulse Width Modulation (PWM), allowing converter to fully turn on, giving trailer lights full brightness during activation
  • Powers the trailer's stop, turn, tail and running lights directly from the tow vehicle's battery
  • Unit prevents feedback from trailer to vehicle system
  • May be used on 2 and 3 wire systems
    • When used on 2 wire systems, brake wire on harness must be grounded
    • Adapts a 3 wire system on the towing vehicle to a 2 wire system on the trailer
  • Will work on vehicles and trailers with either LED, incandescent, or standard bulb taillights
  • Works with most vehicles multiplex wiring systems for lighting
  • Optional install kit available to help run wire to vehicle battery - 118151
  • One-year limited warranty
Warning:
Overloading circuit can cause fires. Do not exceed lower of towing manufacturer rating or:
  • Max. stop/turn light: 1 per side (2.1 amps)
  • Max. tail lights: (5.6 amps)
Read vehicle's owners manual and instruction sheet for additional information.

119176 ModuLite Protector with Circuit Protection


 
Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit - Includes Testers
Product Code: 119176KIT
Product Price: $64.94
Product Weight: 2.00 pounds
More Information and Pricing

Tow Ready Circuit Protected ModuLite Vehicle Wiring Harness with Hardwire Kit (Includes testers)


Features:

  • Short circuit protection safeguards itself and the tow vehicle against harmful electrical shorts and mis-wire situations
  • Virtually eliminates draw on the vehicle taillight circuit
  • Taillight circuit has been upgraded to work with vehicle using PWM, allowing converter to turn on fully giving trailer maximum light brightness
  • Powers the trailer's stop, turn, tail and running lights directly from the tow vehicle battery
  • Unit prevents feedback from trailer to vehicle system
  • May be used on 2 and 3 wire systems
    • When used on 2 wire systems, brake wire on harness must be grounded
    • Adapts a 3 wire system on the towing vehicle to a 2 wire system on the trailer
  • Will work on vehicle and trailer with either LED, incandescent, or standard bulb taillights
  • Works with most vehicle multiplex wiring systems for lighting
Warning:
Overloading circuit can cause fires. Do not exceed lower of towing manufacturer rating or: Max. stop/turn light: 2.1 amps per side. Max. tail lights: 5.6 amps. Read vehicle's owners manual and instruction sheet for additional information

Included with Hardwire Kit:

  • Modulite Wiring Harness (119176)
  • Modulite Install Kit (118151)
    • 20' of 12 gauge wire, ring terminals, and inline fuse for battery connection
  • Circuit tester
    • To help find wires behind vehicle taillights to gather signals
  • (5) Quick splice wiring connectors
    • Makes tapping into wires quick and easy
  • Integrated 4-Pole Cover
    • Protects 4-pole connector from the elements and reduces dirt, debris and corrosion for trouble-free use

119186 Tow Ready Circuit Protected ModuLite Protector with Hardwire Kit


 

Choosing the Right Wiring Harness

In order to choose the correct wiring harness for your vehicle you first must know how many lights are on the trailer you will be pulling.  The number of lights determine the number of amps that the trailer is going to be drawing from the vehicle's wiring system.  Standard Taillights usually require 2 amps per light.  Clearance and Reverse lights take 0.5 amps per bulb.  Some clearance and reverse lights have 2 bulbs. Wiring harnesses without the black converter box have a capacity of 7.5 amps per circuit (22.5 total amps), but are limited by the capacity of the vehicle's wiring system.

Lights on the Trailer Total Amps Suggested Wiring Harness

2 taillights with sidemarkers

6.2 amps

2.1 Turn/Stop
2 Tail

2 taillights with sidemarkers, 6 clearance lights

9.2 amps

2.1 Turn/Stop
5 Tail

4 taillights with sidemarkers, 6 clearance lights

15.9 amps

4.2 Turn/Stop
7.5 Tail

8 taillights, 8 clearance lights

24 amps

8.0 Turn/Stop
8.0 Tail


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