Hi,
I have an Nissan Bigjoe pdc-30-154 electric forklift, yesterday while going over a bump it stopped working, the problem appears to be the middle electric contact will not engage.

The top contact is forward drive, the bottom contact is reverse, and the middle engages power.

If i manually press in the contact while the fork is in forward drive it goes but it will not engage the middle contact using the drive controls.

Everything else appears fine; horn and lift controls on the control mast are working, forward and reverse on the control mast are working, brakes working, lift control levers are working.

Any ideas?

Thank you very much for any help you can provide.