Having issue with my 6465 worked fine this morning just drove off in it this aft and it stopped, codes 1077, 174 723 occasionally does 1077 on starts then clears. ignition off they clear but when i put ig back on just beep every few seconds and glow plug light inlet air temp in lower right display then coolant temp and high pressure filter light all flash with beep simultaneously. In this condition If I try start other codes come up and just turns over
ive checked the voltage regulator/surge thing next to ecu and bridged it no change, also with circuit tested checked all fuses in board behind seat, and swapped ecu relays both seemed to click fine, and checked voltages at the pump 12.4v 11.4 and 3 ish at other end ones, i suspect this is not actually the issue more related to the beeping and flashing lights isolating somethingHELP