And the problem didnt follow ey? Now you have no steering? Probably a fried print board. With trucks battery disconnected, remove main print board from controller panel and remove metal cover. Look where the gate wires for the igbt's plug in (upper right quadrant of card) and look real carefully with mag glass. Look for blown out component(s). This sometimes happens when the igbt shorts out gate side. Always replace the igbt's with matching pair. Card can be remanned.