Just one quick question that I hope someone knows. I have several out lights in my 2002 Ranger instrument cluster. I have a list of three possible bulbs that are the replacements, 194, 161, and 1815. The first two I can buy anywhere but the 1815 bulbs I can only find online. I have been unable to find out which bulb actually goes in the main dashboard sockets. I have not pulled it out, yet. Does anyone know which light is correct?

Greatly appreciated,

 

The 194 bulbs should be the illumination lights. Removing the cluster to change the bulbs is not a hard job, but it is time consuming.