SUZCO SUZCO 25 Foot 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, 4-Way Plug 4 Pin Male & Female Extension Connector & Wishbone-Style with 18 Gauge White Ground Wire with SAE J1128 $9 ...

If your boat trailer lights malfunction and you’ve checked the wiring and replaced the bulbs without results, try checking the light system’s grounding. Many boat dealers and garages th… ...