Thanks much for your reply. Reverse, forks first. Machine also has intermittent brake problem , changed dead man switch but did not help. Felt both issues might be related so I cleaned all contacts on traction control card and now have reverse working. Im not sure I actually fixed it or is it a fluke as the intermittent brake problem is still there. BTW the brake control module has a yellow fault light when the brake problem is happening. I have two machines I was thinking of swapping traction modules to see if the problem, follows the module or not. model is sp3220-30 sn 1A269561. Thanks again.