Wiring Harness - su Amazon AdAmpia gamma di strumenti e attrezzature musicali. 5 Way Wiring Harness | etrailer Lowest price guaranteed, same day shipping, thousands of 5 way wiring harness reviews. Best 5 Way Wiring Harness | etrailer selection available. E Harness 5 Way | etrailer 5-Way trailer harness connects to your tow vehicle to control trailer light functions. Wishbone-style harness comes with 2 tail light wires split for simple wiring.