69 vert, 302 C4. Standard package, No Tach. Idiot lights for alt & oil psi.

How do you get at the warning lights in the alternator and/or oil/temp gauge?

Pulled the cluster and replaced all the illumination bulbs(194's), but I think the bulb(idiot light) in my oil pressure gauge is burnt out. It did not come on with the lead grounded. Do I need a new gauge or can you take the thing apart?

PS...the article in FAQ's is not avail.