Should be regular old 194 bulbs. Heck all the vehicles i've ever owned had 194s in the gauge cluster. even my 71 chev. Installing....i have no clur on a 94. I know 95+ very well though. You got to pull the gauges out. Probably pull the radio, then then plastic crap under neeth the steering wheel, then pull the plastic panel in front of the driver, then pull the gauges. the 194's are in "twisty" holders. I don't know the proper name...that's just what i call them. Twist out the holder, gently pull out the bulb from the holder, replace bulb. Easy, just time consuming if it's your first time.
'01 XLT disguised as a '03 Fx4 Level II
Big. Loud. Slow. Bright.