I’ve got a 2007 Ford Explorer. About a week ago I noticed that the red battery icon showed up. I hit the reset button for diagnostics/system check and got the “Check Charging System” message. OK, fine. Several minutes later I hit the button again - this time it said “Charging System OK”. It’s been going on/off now for the last week or so. What seems to bring it on is this: if I’m at a stop light and my air conditioner is on full blast, I get the battery light. If I turn off the AC at a stop light, the light doesn’t come on. Even if the light does come on, once I get away from the stop light, everything seems to be OK.
I figure that whatever is going on is going to get worse and I’ve been lucky I haven’t been stranded so far. Any thoughts as to what it might be? Should I try to tackle this myself or just take it to the mechanic? Thanks