[Mr. Creosote]

Mine is a base 06 and I did the same conversion as you (had the cruise added) and my light works.

 

[Mr. Creosote]

Where is your light? Can you take a pic? My cluster only has
temp-speedo-fuel on it no tach or O/P guage.

Well mine has the tach, but here is a picture anyway. It is a little blurry because I was holding the cam too close. The cruise light is at the bottom center of the tach.