another no start question

I recently changed over to all autometer gauges on my dash. The car started once then died and will not start. I have fuel and spark on the engine.
The one thing I did not do was connect to the 12v and the ground on the original wiring group. I pulled the power from the fuse panel instead. Does this need to be connected to start or should I look some where else for the no start problem?
thank you in advance.