Since summer has arrived I’ve been having a recurring problem the last few weeks. That is, on really hot days, 85" +, my battery/alternator light will come on. If I’m sitting in traffic, I put the vehicle in neutral and rev the engine and it goes off (for short while).
However, one day, after being on the highway for an hour all signs pointed to an alternator failure as systems started to go off. Then I buried my foot in it and suddenly all was good again. Went right to a repair shop after this (the same one I had been to a week before), and again they tested alternator and battery and found both to be good.
It was only after this last visit that I made the correlation between hot weather temperature and the problem occurring. Any suggestions on how to remedy this?