Overview
The Tow Ready 118709 is a 7-way round pin to 4-flat trailer wire adapter. It is designed to connect the factory harness to a pigtail that the trailer lights plug into.
Key features
- 7-way round pin input
- 4-flat output through a pigtail
- Plugs into the factory harness
- It is universal fit.
Round pin and flat connectors
Trailer wiring uses several connector shapes, and the round pin and flat pin styles are not interchangeable. A 7-way round pin plug is common on older tow vehicles and heavier trailers, while 4-flat connectors are typically used for basic lighting. An adapter like this one bridges the gap so the factory plug can feed the trailer lights through a pigtail.
When choosing an adapter, identify the plug on the vehicle first, then the connector on the trailer. Pin count and orientation matter, so a plug that looks similar may not seat fully. Keep the pigtail protected from road spray, and inspect the pins for corrosion before each trip.
- Identify the vehicle plug before buying
- Check pins for green or white corrosion
- Protect the pigtail from road debris
Specifications
| Brand | Tow Ready |
|---|---|
| Part number | 118709 |
| UPC | 16118066708 |
| Input connector | 7-way round pin |
| Output connector | 4-flat |
| Connection | Pigtail for trailer lights |
Vehicle fitment
It is universal fit. Make sure the factory harness on your tow vehicle has a 7-way round pin connector before buying.
Confirm your vehicle’s year, model and trim before ordering.
What’s included
The pigtail is part of the adapter as described.
