Hi there, thank you for the advice. Its the original NH card which originaly worked fine, however the fault had developed at a later stage. As for function 15 its set correctly for a 48v system, and i dont think anyone has tampered with function 13 as no one except for myself had the handset there, but would appreciate the factory settings as this will allow me to check all settings and adjust if required. I could not try another card as i dont have a card available for the EV IGBT controllers. I checked battery voltage output from the logic card to the BDI at the pin of the logic and i have battery voltage, but to be fair did not check at the back of the dash display. Will recheck that next week. The other strange thing i have noticed is that each time i make an adjustment on a parameter i need to actually disconnect the battery discharge the system through the horn button in order for the truck to work after any adjustments are made, i found that strange dont know if anyone can shed any likght on that.