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

1. Plug the T-connector into your existing 4-pin lighting harness.
2. Attach your tail light, backup light, or accessory lighting plugs to the two female connectors.
3. 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.