the details have changed since your other post so i gues you left out some details and reposted to better describe the situation but you never answered my question from your other post so i'll ask it again here:
have you put your test meter on the battery and checked if its really getting 15.5 volts?
i highly doubt it is since most charging systems dont put out over 14-14 1/2 volts
seen here as part numbers 6a 12 and 18
http://www.suzukipartsnation.com/pag...004/5611840031