Tekonsha 118590 T-One Harness | 2014 Impala
Tekonsha 118590 T-One Harness | 2014 Impala — Product description
Adding a hitch to your 2014 Chevy Impala for a bike rack or a small trailer? The Tekonsha 118590 T-One harness is the clean way to get lights back there. It plugs into the factory connectors, no splicing, and the circuit-protected ModuLite HD module keeps the trailer's load off your car's wiring.
The Tekonsha 118590 is the T-One wiring harness built specifically for the 2014 Chevrolet Impala. If you're adding a hitch to your Impala for a bike rack, a small utility trailer, or a cargo carrier that needs running lights, this is the harness that gets power back to the trailer without you cutting into the car's factory wiring.
Here's what makes the T-One easy. It plugs straight into the connectors already behind your Impala's tail lights. No splicing, no test light, no guessing which wire is the left turn signal. You find the factory plug, click the T-One in line, and you're most of the way done. For most folks it's a driveway job with basic hand tools.
The upgraded part is the ModuLite HD module. Instead of pulling trailer-light current through the car's delicate factory circuits, the ModuLite draws power straight from the battery and uses the vehicle's light signals only as a trigger. That keeps the trailer's load off the Impala's wiring and computer. It's circuit protected too, so a short at the trailer connector, a corroded pin, or a pinched wire doesn't take out anything on the car side. The protection resets itself once the fault clears.
On the output side you get a standard 4-flat trailer connector, which covers running lights, left and right turn signals, and brake lights. That's everything a lighting-only trailer or a lit bike rack needs. If your trailer has electric brakes, you'll want a brake controller and a different connector, so this isn't the harness for a heavy travel trailer. For lights, though, it's the clean answer.
One note on fit: this exact part number is cut for the 2014 Impala. Tekonsha builds a different T-One for other years and models, so if your Impala is a different year, check with us before ordering and we'll point you to the right one.
Key Features
- Custom-fit T-One connector for the 2014 Chevrolet Impala, plugs into the factory tail-light connectors with no splicing or cutting
- Upgraded circuit-protected ModuLite HD module draws trailer-light power from the battery, keeping the load off the vehicle's factory wiring
- Self-resetting circuit protection guards the car's electrical system against trailer-side shorts and corrosion
- Standard 4-flat output connector powers running lights, left and right turn signals, and brake lights
- Uses the vehicle's light signals as triggers only, protecting the factory computer and circuits
- Genuine Tekonsha assembly, part number 118590
Why Buy from NVN Marine
- Authorized Tekonsha reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | T-One Connector Assembly With Upgraded Circuit Protected ModuLite HD Module |
|---|---|
| Brand | Tekonsha |
| Manufacturer Part Number | 118590 |
| UPC | 016118123067 |
| Vehicle Year | 2014 |
| Vehicle Make | Chevrolet |
| Vehicle Model | Impala |
| Connector Type | T-One |
| Module | ModuLite HD |
| Circuit Protection | Circuit Protected |
Frequently asked questions
Will this fit my Chevy Impala?
This exact harness is cut for the 2014 Impala. Tekonsha builds different T-One connectors for other years and models, so if yours is a different year, check with us first and we'll match you to the right part.
Do I have to cut or splice any wires?
No. The T-One plugs directly into the factory connectors behind your tail lights. There's no cutting, no splicing, and no test light needed to find the right wires.
What does the ModuLite HD module actually do?
It pulls trailer-light power straight from the battery and uses your car's light signals only as a trigger. That keeps the extra load off the Impala's factory wiring and computer, and the circuit protection shields the car if something shorts at the trailer.
What kind of trailer connector do I get?
A standard 4-flat. That covers running lights, both turn signals, and brake lights, which is everything a lighting-only trailer or a lit bike rack needs.
Can I tow a trailer with electric brakes using this?
Not with this alone. The 118590 handles trailer lighting only. Electric brakes need a separate brake controller and a different connector, so this isn't the setup for a heavy travel trailer.
What happens if my trailer wiring shorts out?
The ModuLite HD module is circuit protected. A short, a corroded pin, or a pinched wire at the trailer won't damage the car's electrical system, and the protection resets itself once the fault is cleared.
