My charging light was on constantly last month....even though the alt had 13.2v...and the batt had 12....now that its cold out...it only comes on once a week if im sitting in a parking lot, not moving. Im thinking that the regulator is overheating...meaning impending failure....anyone concur?

1998.5 Ford SE Zetec 2.0 auto 190km "What do you do for recreation?" "Oh, you know, the usual. Bowl, drive around, the occasional acid flashback."