No Gauges
Since you tried swapping guages, I would make sure that you are getting 12V to gauge.  I am assuming its a multipurpose guage.  Ground should be black, and 12v should be R/Pr.  I don't have your exact schematic, i'm using a 96SPX.
You might want to check the fuse in the EM as it looks like the top fuse only feeds the Multi. guage.
Lou