Code 66 In only one direction Did change Field and the fault go to Backwards.
Did change controllers problem stays. Wiring check all wiring correct. I did take out drive motor and It goes to service center but they didin't find problems !!! I build motor back
When I put the pedal quikly down truck moves forward after few meters the maincontacter falls of truck stops I release the pedal and I put in again the pedal in truck drive again !!!!!! In troubelshooting stays I must reset truck with contact key but its not !!!
I did change contacters and bypass contacter
Now I gonne be crasy of this problem
And I have No Other Motor for it
PS. I did the controller build in to other truck and it give's no problem and I did build in the controller of other truck same problem.

Have some body Tips to get solved this problem any help are welcome

Kindly regards

John.