I'm trying to figure out how to make the gauges work in my 90 d150 with 99 5.9. Does anyone know if the resistance is the same for oil pressure and temp sender? Does the computer need the oil pressure reading to run correctly? I know it doesn't have the reading in obd2 functions so want sure if it was necessary. Thinking I'm going to put in a 93 fuel pump for fuel gauge or get a 90-0 sending unit and use a dakota digital signal converter for speedo. Any suggestion on temp, oil pressure and fuel? I'm pretty sure I have no other option for speedo.