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· 1 x Car Battery Isolator. Fix the relay to the positive pole of the battery. Fix the original vehicle positive power line to the relay. · Extend Battery Life. Connect the black wire to the negative negative pole of battery.
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.