The Splitter is used to wire an additional LED light into an existing circuit. The Wire Harness is used to provide power to the lights on that circuit. The Baja Designs Splitter is a straightforward way to add another light to your wiring harness. These Splitters are available in multiple sizes and configurations to meet your exact needs. The Splitter is the best way to safely and securely install an additional light into an existing wire harness. A Splitter will speed the installation of new lights wherever may require additional lighting. Baja Designs offers these splitter kits which enables an easy way to upgrade your lighting power with other high performance LED lights or light bars.