I have a jeep wrangler 4dr that is always outside as it is open and exposed to the weather, the OBDII port has quite a bit of corrosion and didn't read properly. This connector comes with all wires/pins but I only needed 5, the unused pins are easy to remove and the installation was smooth (make sure you cut and connect one at a time as I used the factory wires in the same color and power had live line). I used heat shrink butt connectors (bought here) to ensure they were waterproof.
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