Amazon: driving light wiring harness Northpole Light LED Light Bar Wiring Harness, 12V 40A Off Road Jeep LED Light Bar On Off Power Switch Relay Wiring Harness for LED Work Lights Driving fog lights. 4.3 out of 5 stars 171. $8 $ 8. 80. Get it as soon as Wed, Aug 28. FREE Shipping on orders over $25 shipped by Amazon. Driving Light Wire Harness for Trucks & Jeeps - Best Light Bars and Harnesses If you want to add an LED light bar to your vehicle, consider a wire harness and light bar kit from Rigid Industries. These harnesses are designed to connect either of two series of Rigid Industries LED light bars to a 12 V electrical source.