I need some ideas or experiance on how to fix my problem,
sitution sunday car was driving fine, parked it started it back up and cel light was on, code was for vehicle speed sensor malfunction, drove it home pulled in to the section turned my lights on and the car died, jumped and it wouldnt hold a jump
took off alt and battery and had both tested and both are good still
checked the fuse for the alt and speed sensor and it was blown, i changed it and it drove fine for a few miles it blew again, changed it it blew again through cel light each time and the codes are
p0500 speed sensor malfunction
p1298 electric load detector circuit high voltage
p0141 secondary heated o2 sensor sensor 2 heater circuit malfunction
I am assuming there is a short but kinda of unsure how to find it or if any one else ran in to this problem
I have the helms manual and I am going to follow the wires and see if i can find anything but not sure if theres a better way or if something else is casuing this

electric mods i have are a system 500 watt amp
egt gague / boost gague / turbo timer / fuel pump /
all have been installed for about 2 months or so and not have had a problem until now
please let me know yoru suggestions I appreciate it
thanks