The Mazdaspeed Protege and Protege5 clusters are known to be pretty dim when you flip the headlights on. Are your speedo and tach dim also? One of the first things I did when I bought my P5 last year was change out the cluster bulbs for new ones. The original bulbs were blackened (once you take off the orange rubber covers on them) and I noticed a difference with the new bulbs in - definitely brighter, but don't expect electroluminiscent bright

. As far as the ODO, if it's not the battery, then I'm afraid you'll have to deal with it being on the dim side.