Originally Posted by garyk1970

all the bulbs that can be replaced are for the cluster illumination.the odometer has its own lighting built in to the display,similar to a vacuum tube type setup (positive or negative LCD display,i cant remember the correct terminology).if the odometer display part number could be found,you can order just order it if its available.luckily 97rloer had the part and I'm only going to replace that.heres a couple pics showing the entire cluster disassembled,and the separate odo unit.HTH.
i wish it was as easy as a bulb,i do electronic repairs as a living........