I'm currently working on a new to me DP50N forklift. I acquired the lift not running with no instrument power or display. I found a handful of wires corroded next to the fuses and relays. Patched them back together and now have power to the dash display. The current state now is a crank no start flashing codes P-03, P-07, P-15. Went to the ECM side and found about 8-10 wires rubbed through on the air filter housing. Fixed the wires I have found and nothing has changed. Plugged into the diagnostic port and shows 5 active codes, for (spn 3719) DPF and high pressure fuel sensor(SPN 5571) which is showing error instead of PSI. Replaced fuel sensor, did not change anything. One thing to note is when cranking, the engine sounds like it fires on one cylinder, one time, then cuts back out to nothing. Wiring nightmare or an I missing something?? Thank you