Match the part number, measurements and connection points that apply to your trailer.
| Function | Confirm stop, turn, tail, marker or clearance function. |
|---|---|
| Mount | Verify housing and mounting style. |
| Connection | Match the plug, pigtail or wiring. |
Part Number: F7KL
Truck-side 7-way blade to 4-flat trailer adapter with integrated LED circuit tester. Designed to quickly verify truck-side trailer lighting functions before troubleshooting the trailer.
The built-in LEDs instantly show whether the tow vehicle is supplying power to each circuit, eliminating guesswork caused by blown trailer-specific fuses common on late-model trucks.
| Molded Connector Wire | Function | Typical Trailer Wire |
|---|---|---|
| White | Ground | White |
| Red | Left Turn / Brake | Yellow |
| Brown | Right Turn / Brake | Green |
| Green | Tail / Marker Lights | Brown |
| Blue | Electric Brake Power | Blue |
| Black | 12V Hot Lead | Black |
| Yellow | Auxiliary | — |
