97 Plymouth Prowler indicates 16 volts while running. Where is voltage regulator

Hello, The voltage regulator is part of the alternator. Simple enough, just replace the alternator. Also, the battery may suffer and fail due to overcharging, and the positive battery post and terminal should be removed, inspected for corrosion, and cleaned if this has run for more than a couple hours. Lastly, electronics are very sensitive to arching, as you already know, and there may be some residual or future issues after shorting the positive battery post to ground. Check all of your fuses as well. http://repairpal.com/plymouth-within-10-miles-of-morrison-illinois-61270

Scan test required .. PCM contains and controls voltage regulator.... Good idea to read actual alternator output voltage at battery terminals using a volt meter.