Using this conversion harness is easy. First, make sure your vehicle is the right model (2009 - 2012 Dodge Ram with Quad/Dual Halogen Lights or 2013+ Dodge Ram with Quad Halogen Lights). Then, simply plug the harness into the appropriate places on your truck's existing wiring. Since it's a plug - and - play design, you don't need to cut or splice any wires. When installing, be gentle with the connections to avoid any damage. Note that these adapters are only compatible with OEM / TYC headlights, so don't try to use them with depo aftermarket headlights. For maintenance, keep the harness clean and dry. If you notice any loose connections or problems, check the connections first. If issues persist, contact the support team as the harness comes with a 1 - year warranty.