My 93 diesel came with a MM snowplow setup from the factory (I assume). I removed the entire plow control and plow light harness as carefully and correctly as possible, but I still have some extras. There are a pair of wires that come from the harness next to the rpm sensor . They are about 3 ft long, and terminate in a two-hole female plastic fitting. There is no corresponding fitting on the plow harness. I hate extraneous wires, so if these don't serve a necessary function, I'd like to remove them.