The Western Uni-Mount snowplow uses a 9 pin Harness to control all the plow light functions and the power pack controls. Unfortunately, it has proved to be very susceptible to corrosion. The trick to long life of the pins is dielectric grease. Central Parts Warehouse recommends lightly both sides of the 9 pin harnesses 4 times a winter. It is NOT necessary to pack the plugs with grease, just a light coating.
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