hi, i have recently installed a swem alternator conversion kit with a 12si 78amp delco alternator in my 122 wagon. for the month ive had it, things have been great. more light to see the road than i thought possible. the other night i was driving in the rain. headlights, foglights, windshield wipers and stereo all on when everything started getting real dim. i bearly made it home. the next morning the battery was dead. i charged it and checked it with a multimeter. it reads 12 volts. than when i start the car it goes up to about 14 volts, but if i turn on my lights or wipers it goes down to about 10 and very slowly drops. is there something wrong with my new alternator? or could it be something else. ive also replaced the fuse block, the battery terminals and the ignition system. thanks alot--travis