electrical help please

[RRROBB]

My gauge lights are not working. The problem is the ground located on the left pillar post is not attached. Can anyone tell me where this ground connects?
Thanks in advance

 

[RRROBB]

clarification

The ground wire is conected to the left pillar post and not attached at the other end. My electrical troubleshooting chart shows it meeting up at "S225"
I dont know what s225 is....anyone?......Bueller??????

 

[lone73]

Are you talking about the center guage cluster? Speedo and Tach? I believe you have the printed circuit on the backside of it. Are you saying there is no ground wire to that circuit board (or whatever it is)?
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