How to Install Wiring Harness in 2019 Honda Ridgeline
Updated 05/06/2022 | Published 11/08/2018
Question:
Can you give me some guidance on how to install the 4-flat wiring harness 118778 in my 2019 honda ridgeline? it's a little diffrent than what ive seen.
asked by: Jack L
Expert Reply:
The installation of the T-One Vehicle Wiring Harness with 4-Flat Trailer Connector # 118778 on your 2019 Honda Ridgeline is a bit different because it uses a black box module, but it is still a straightforward install.
What you will need to do is connect the black box module into the 12-pin tow plug that will be near the center of the back wall of your '19 Ridgeline's cab. Once you mount that, you'll need to look under the hood of your Ridgeline and find the fuse panel and insert the included 7.5 amp fuses in Position 6 and Position 7; after that install the included 20 amp fuse in Position 9. I have added a cut out of the directions which displays this.
You then need to find the grey housing under the bumper on the driver's side and remove its protective cap; plug the towing harness into the grey tow plug and route the harness to the back of your Ridgeline's bumper.
I have added a link to a video review of this part as well as a link to the instructions for you to check out.
Mario
2/24/2020
I have a tester! I’ve checked connections! I checked fuses! Everything checks out! I see that others have Gad the same problem! The OEM harness comes with two relays. Is this what’s missing to make it work?
Chris R.
2/25/2020
Louis L.
4/20/2020
Just received my kit for a 2019 Honda RidgelineKit#118778 Evrything works but the running Lights. This seems to be a problem with this installation, Why cant you pinpoint where the missing connection is to the running lights circuit. I just installed the second black from you folks, and it did not solve the problem. Can you find where the missing link is, and get back tome? I dont have access to the Honda wiring diagram, or I would have solved the problem by now. Waiting for your reply, Thanks.
Chris R.
4/21/2020
Chris R.
4/23/2020
Product Page this Question was Asked From
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Visible
- Tekonsha
more information >
Featured Help Information
Instructions
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Mario
2/23/2020
Part #118778 I just received this and installed it per instructions. Simple and straightforward. Turn signals and brake lights work but no tail lights. Ive checked connections and fuses and still nothing. Is this a defective part?