As others have suggested, get the car running and check charging voltage at the battery terminals, 14.0 -14.5 volts. Compare it with John's suggestion of 14.5 volts at the BAT terminal, big red wire, at the alt to ground.
Also, check for no more than 0.5 volts from alt frame to the battery negative terminal. This will insure a good return path between the two. Then check for less than 0.5 volts betwen the BAT terminal on alt to battery positive post. This will insure a good connection. A quick and dirty check to see (feel) if alt is charging, is take a screwdriver and lay it across the bearing cap at the rear of the alt being careful not to touch other terminals at the same time. If you "feel" a magnetic pull on the screwdriver, the alt is charging some. The greater the "pull," the heavier it is charging.
I was asking about the GEN or ALT light, red in color with the IGN on and engine off. Dash lights, or dash illumination is a function of the headlamp switch. Another quick check is to turn on headlights, shining against the wall, and attempt to start. If they dim, then low charge of battery, or starter may be drawing too much current, as it may have a shorted field or worn brushes/armature.
If dash illumination doesn't work, then you might rotate the headlamp knob to see if they come on, all the CW(?) will turn on the dome/interior lights.
Let us know what's happening.....
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