Wiring Needed to Flat Tow and Tow a Trailer with a 2004 Jeep Liberty

Updated 05/07/2018 | Published 05/04/2018

Products Featured in This Question

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(80)

$71.82

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

(74)

$64.84

Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord

(3183)

$179.96

Roadmaster Brake-Lite Relay Kit for Towed Vehicles

(700)

$47.73

Question:

I have a 2004 Jeep Liberty I want to wire it to be a toad vehicle and to tow A utility trailer on occasion .what set up do I need ?

asked by: Ron M

Expert Reply:

Even though the wiring looks the same for flat towing and trailer towing with a 2004 Jeep Liberty, you actually will need to use different wiring harnesses.

If you don't already have wiring on your Liberty for towing a trailer then I recommend going with the Tekonsha T-One # 118524. This comes with connectors that T into the wiring on your tail lights and wiring that you run up to your battery to power your trailer lights. This gives you a 4-Way connector to activate the standard light functions on your trailer.

For flat towing you can use a kit like the Hopkins # HM56203 which T's into the tail lights just like the T-One. These two kits can actually be plugged into each other. The only problem with the Hopkins is that it has a 4-Way connector. Since most RVs have a 7-Way connector behind them I recommend going with the Flexo-Coil Wiring Kit # RM-15267 instead. This includes diodes to keep back-feed from happening.

With the flat towing setup you also need to install the Relay Kit # RM-88400 to prevent the brake signal on your Liberty from overriding the turn signal from your RV.

Please note that a complete flat towing setup includes a base plate kit, tow bar, safety cables, vehicle tow bar wiring, a supplemental braking system, and possibly a high-low adapter. Let me know if you are missing any of these parts and I can make some recommendations for you.

I have also attached some installation details and videos that you can reference.