How do u bring up the service codes on a seville?

On my 94 Sevile you hold down the off & warmer buttons at the same time till the DIC goes into the diagnostic mode, then the codes will cycle through.

on 98 you hold down the ummmm.. either the middle or the right one of the three buttons to the right of the gauges and press the left button of the three in the up position and hold those two down, then it will black out and then light everything up and say some stuff like ALL? then you hit the middle of the 3 i think and it says ALL CODES then hit ti again and it will cycle through. I forget what the buttons say, i'm so used to hitting them i just do it without looking lol

It's the OFF and INFO up button you press.