Where do I connect these two wires coming from the pcm? First wire 16 gauge fuel pump feed: positive output for an electric fuel pump. Next is a 12 gauge cooling fan feed. ( positive output for an electric cooling fan. 30 amp fuse. Just to clarify things I just installed a Ron Francis express wiring harness. It has wiring and relay for fuel pump and electric fan. Would this mean I would not need to connect these two wires? Another question in relation with the cooling fan, would the above wire give power to the fan only when temperature is reached, or is it just a power supply?