Why on a 85 el camino do all 4 gauges peg out after car has ran for awhile?
You might have a bad ground wire,you will need a wiring diagram to find location of grounding points.
Where is the fuse box in a 1994 Saturn SC2 and which fuse controls the gauges or what else might make the gauges stop working?
Ok. Most people do not know this, but, the "on" position of the key, without the engine running, is a diagnostic point. When you do this, all of the red, yellow, or whatever color lights should all come on, telling you that they all work. All electric gauges should pin, confirming their operation. Now, when you go to the start mode, all kinds of things are happening voltage wise, so some bouncing around will occur.