Other electrical issues, 91 mr2.

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i got this car recently, and this electrical issue is murdering me. ive replace the altenator and the battery cause both of those were bad but now im seeing that the cluster isnt fully operational, it lights up and displays the proper rpm, battery charge and shows me all the proper lights etc. all the others were not working which hasnt bothered me but lately its been showing a gradual increase in the batterys charge... the gauge for that just went past 15v this morning so im a little concerned