Instrument Lights to change...

Hello out there,

I have a problem, the light of the tachometer won´t work, lighting for other instruments are fine (also for dimming). So how to change the bulb? It is a 68 Barracuda. Can I change it from behind or I have to disassemble the dash from the front? Any hint (pic, drawing, how-to) would be helpful!

Thx in advance,

Gerald