XDR-9 LED Light Bar Wiring Harness Kit Relay (1x 240W Wire Harness Kit) XDR-9 LED Light Bar Wiring Harness Kit (1x 240W Wire Harness Kit) Relay to power and ground 18 Inches; Relay to switch 9 Feet; Relay to light bar connectors 9 Feet 40A Relay with fuse protection Round LED Switch (Red) Single output = To any light bar up to 240W (Splicing may be required if you use on another light bar; 100% plug and play with XDR9 light bars)