Blue Ox BX8848 4 Diodes Taillight Wiring Kit<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diodes prevent electrical back feed which can be damaging to the towed vehicle's wiring system</li><li>Includes wiring harness and 4 diodes</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41lJXWulFPL.jpg" noproxy>