2 to 3 Taillight Converter 2 to 3 Taillight Converter for Connecting Tow Vehicles w/2 Wire Systems to Towed Vehicles w/3 Wire Systems Allows R.V.&&';;s & other vehicles with 2 wire systems to tow vehicles and trailers with 3 wire systems Note:*This module will not work with LED lighting on the tow vehicle. The tow vehicle would have to have incandescent lightingWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.