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No hardwiring is required to install this adapter. The black wire (14ga) is for 12 volt power, red wire (18ga) is for stop light, blue wire (14ga) is for brake output signal and white wire (14ga) is for ground.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.