I recently replaced my alternator. Afterwards, the ammeter shows very low charging voltage until I rev up engine and then only to about 12V. Recently, my AC would not engage. Tech told me I had low voltage problem. Also there is an intermittent "clicking" sound from somewhere within the dash or rear compartment. Is this related? Do D's have voltage regulators? Any suggestions as to why I would have chronically low voltage? Bobby Mims Tyler, Texas [Non-text portions of this message have been removed]