My boss snowplow was installed by the dealer using a 20 amp fuse (should be 10 in owners manual) it lost power this morning. I pulled the fuse it had melted behind the fuse some. It was hooked it slot 45 which controlled the transmission. Now my od light blinks, it only creeps in F or reverse. I had it towed to repair shop and they are struggling even with a diagnostic tool. Any help? It is an f-250 superduty 2003. They have the plow working fine but I must have shorted out the computer, os VSS maybe?