My 93 5.0 is currently having an alternator overcharging issue which causes the battery hiss and lose water. I took the alternator to a local rebuild shop and they replaced the rotor under warranty. The car was fine for about a day and a half and then started overcharging again. Could an issue in the wiring from the alternator to the battery cause this? This car was converted to the 3g alternator by Ford as was a highway patrol unit. Thanks for any help.