swapped out my 1990 omc 4.3 with a 1988 omc 4.3, hooked up the main power plug, seem to have power to all instruments, motor starts and runs. I'm not sure about temp guage and for sure not tilt/trim motor. i'm not sure what to look for or where it goes, is there anything i'm missing? this is a 1990 four winns 205 sundowner. thanks