Battery light and "check charging system" warning
The battery I have is less than a year old. The alternator is less than 4 months old (replaced it due to the misfire errors) and everything has been fine since getting the alternator changed out - until last weekend.
I made about 6 trips up into the mountains for snowboarding the last few weeks and subjected my car to sub freezing temperatures (Don't know if thats a factor?)
Last weekend on my latest trip I was hooning down a 2 lane desert road. Averaging about 120mph for 5-10 minutes, and flooring it whenever I pass someone.
All of a sudden the battery light and check charging system warning kicked in. I saw the battery charge gauge start dropping and quickly killed my heater, shaker1000, and headlights (just kept the fog-lights). After that it held steady and the warning went off until I turned the headlights on again and the warning came back. After about 5 minutes the warning went away all together, and the rest of the 2 hour drive was fine even with the shaker1000 and headlights.
I took it to the mechanic the next day and of course everything was fine - held charge at 13.6v despite blasting AC, Music, and lights on. Next they pulled and played with the wires to see if there was something loose. That wasn't it either.
This last week the car has been completely fine ( I daily drive her, at least 30 miles a day).
Was this a freak occurrence or is my alternator going out again? I want to go snowboarding again soon and the last thing I want is for my car to die on the side of a desolate desert road, with no cell reception.
2001 Mustang GT - Crashed (Other person's fault) Stock.
2003 Mustang GT - Sold
Lowered, Flowmaster catbacks, CAI + Tune, 5% tint all around, American racing wheels.
2005 Mustang GT - Traded in
"Performance" spark plugs and ignition coils, 5% tint on back 3 - 20% on front two, 20 inch silver AMR wheels
2011 Mustang GT - BEAST
5% tint all around. 2014 GT premium wheels. Roush axleback