Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Quickly and easily install a 4-way trailer connector on your Ford Focus with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.
Features:
Specs:
Installation
This custom-fit T-One connector plugs into your Ford Focus's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness.
Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.
Once installation is complete, the 4-way flat connector will be stowed within your trunk or rear cargo area.
It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
A ModuLite power module is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your Ford Focus's three-wire system need to be combined so they are compatible with the wiring system of your trailer. This power module functions as a tail light converter to combine the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your Ford Focus operate.
With a ModuLite, your trailer's lights will be powered without overloading your Ford Focus's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.
Video of T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today on our 2012 Ford Focus well be installing Tow Ready T1 connector, part number 118549. Now well begin by opening the tailgate and remove the vehicles taillight housing assemblies. To do this here on the drivers side well remove the black plastic cover and pull back the insulation liner to access the plastic wing nut holding the taillight in place. Theres another wing nut in here that well also need to undo. With both wing nuts undone we can remove the drivers side taillight. Well repeat this process to remove the passenger side assembly.
Were also going to go ahead and remove the rear threshold as well put our wiring harness behind it. Now that we have our interior undone here on the drivers side well need to pass the T1 connector through the vehicle. To do this well cut a slit in our rubber grommet here where the factory wiring harness passes through. We can then feed our T1 connector in and reinstall the rubber grommet. Well now plug our T1 connector into the factory wiring harness.
Youll notice here on the drivers side youll have a white wire with a ring terminal this is the module light ground. Well use the supplied self-tapping screw to run into a body ground connecting our white wire to it. Now with all that done here on the drivers side we can go ahead and reinstall our taillight remembering to plug the other side of our T1 connector into the taillight assembly. Well now route our red and green wire to the passenger side where we can again cut the rubber grommet, pass our T1 connectors through, and reinstall the grommet. After making our connections here on the passenger side we can go ahead and reinstall our taillight.
With that done well need to connect our black wire included with the harness to the module light. Well need to find a suitable location where we can pass the black wire through the body to run it up under the hood. Youll see there are some body plugs here well cut a small slit into the body plug and pass our black wire through it. Well strip the insulation off the black wire as well as the red wire on the module light box. Now using the yellow butt connector, connect the two together.
We can now go ahead and reinstall our interior pieces. Make sure to keep the wiring out of the way of any of the connectors as youre reinstalling. Well now move underneath the vehicle where we can now route our wire up to the battery. Now youll want to make sure you stay away from any moving components such as your suspension or hot components such as your exhaust while routing this wiring. Here at the battery well cut off the access black wire and attach the second of the two yellow butt connectors. Well now take our fuse link, clip it in half and strip back the insulation. Well attach the large yellow ring terminal to one side and the other side well attach the yellow butt connector thats already been attached to the wire. With that done were now ready to connect the yellow ring terminal to the battery. Now there are several ways to do this, were going to go ahead and clip our ring terminal to make it slightly smaller where we can go around the positive terminal post and tighten it down. We can then install our 10 amp fuse included with the harness which will complete the installation of our Tow Ready T1 connector, part number 118549, on our 2012 Ford Focus.
2012 Focus by Ford Owners Who Purchased This Custom Fit Vehicle Wiring Also Bought...
Average Customer Rating: 
4.5 out of 5 stars (4 Customer Reviews)
by: Wes11/22/2012
Is this review helpful?
This wiring kit worked well, however you don't have to route power from the battery in the engine compartment to the trunk as the directions say (which is a pain). There is a fuse box in the rear drivers side of the trunk in the 2012+ focus, and you can tap into the fuses there (Get an ATM style fuse tap from any auto parts store). Much easier than routing a cable all the way from the engine compartment. otherwise works well.59926
by: Ashleigh Heinichen05/23/2013
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great wireing harness 81713
by: Kevin P`02/08/2013
Is this review helpful?
Easy quick install 65429
by: Jimmy Mac11/01/2012
Is this review helpful?
It's a new 2013 Ford Focus and I was not in any rush. The wiring took me about 3½ hours, start to finish. I ran the wire inside the car and had trouble finding a place to exit the firewall so I exited the floor under the clutch, through a grommet and up the firewall to the battery. You need the 12 volts to run the 4 prong trailer plug. Works great 58619
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Installation Details
