Grand General – 4-Pin 2-In-1 Adapter Plug for Tail & Backup Lights
4-Pin T-F/F 2-In-1 Adapter Plug for Tail & Backup Lights – 9" Lead | Grand General
The Grand General 4-Pin T-F/F 2-In-1 Adapter Plug is a convenient wiring solution designed to convert, split, or simplify your tail light and backup light connections. Featuring UL-listed 18-gauge wires and a 9-inch lead, this adapter ensures a secure, reliable electrical connection without the need for wire cutting or splicing. Ideal for trucks, trailers, RVs, utility vehicles, and more, this plug provides an easy plug-and-play option for multi-function lighting setups.
- Manufacturer: Grand General
- Item Number: 88119
- Connector Type: 4-pin T-F/F (one input to dual female outputs)
- Lead Length: 9"
- Wire Gauge: UL-listed 18 GA wire
- Function: Converts or splits 4-pin tail light and backup light connections
- Fitment: Universal for trucks, trailers, RVs, ATVs, and utility vehicles
- Design: Durable molded connector with flexible pigtail
- Use Cases: Tail lights, reverse lights, auxiliary lighting, multi-function circuits
- Sold By: Each
Performance & Fit
This 2-in-1 4-pin adapter plug provides stable electrical performance thanks to its UL-listed wiring and durable molded connectors. The T-style configuration allows one plug to feed two separate 4-pin outputs, simplifying lighting installations and upgrades. Its 9-inch lead provides extra flexibility for routing and positioning.
Installation
- Plug the T-connector into your existing 4-pin lighting harness.
- Attach your tail light, backup light, or accessory lighting plugs to the two female connectors.
- Secure the wiring and test all functions before finalizing installation.
Why You’ll Love It
- Converts one 4-pin plug into two female 4-pin outputs
- Simple plug-and-play installation
- 9" lead for flexible wiring placement
- UL-listed 18 GA wires ensure safe, reliable operation
- Ideal for tail lights, backup lights, and auxiliary lighting
- Durable molded construction for long-term performance
Common Questions
- Does this work with LED lights? Yes — compatible with LED and incandescent tail and backup lights.
- Is it waterproof? It is not fully waterproof but is durable for standard vehicle environments.
- Will it work on trailers? Yes — suitable for most 4-pin lighting systems.
- Do I need tools? No tools required — this adapter is plug-and-play.
⚠️ California Proposition 65 Warning:
This product can expose you to chemicals including lead and other substances known to the State of California to cause cancer and reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Note: 4-pin T-F/F adapter plug with 9" UL-listed 18 GA lead. Universal fit. Sold individually. Item Number: 88119.