Well, thats good news on the 13.5V measurement. It is the correct charging voltage. I hope that the initial mis-wire did not do any damage to the sensing circuitry (usually a voltage sensing circuit consisting of Zener diode and transistor or integrated circuit within the computer box), if it does, you're in for a big expense that perhaps not worth correcting. I don't recall of any reset for this warning, but try disconnecting the battery for about 15 minutes or longer, and reconnect it (I say 15 minutes, but if you're not in a hurry, I'd leave it off for an hour). This should erase any engine error code stored.
While doing so, check any visible electrical plugs near the alternator, making sure they are secure and plugged in tight. Good luck.
Sunday, October 10th, 2010 AT 12:29 AM