Something was failing with the brand new Ohio Generator alt. It was down to <30A output at idle and had a squeal. Normally, I'd give them a shot at fixing it, but with the pulley fiascos leading up to this, they already used up their get out of jail free card. It's been shipped back for a refund.
Man thats odd, my voltage in a test like yours with headunit,hightbeams, wipers going was a floating idle of 14.5volts, mine was a good alt.
Did you upgrade your power wire running from the alt, and did you upgrade your ground wires ? run another 0 gauge from the battery and one to the ground under the hood. thats the key. the ground is where power will come from.
I am ready to upgrade everything on the truck for a system. have some old rockford fosgate punch amps and old kicker gear to install for a NOS look :rock:
but running a 12 volt idle is low for a spun out alt. Def look into getting that checked out. here is a auction I found off ebay, idle charge of 105 amps.
250 AMP HIGH OUTPUT ALTERNATOR DODGE VIPER 8.3L (505) | eBay