[STL Mark]

Red light above the ignition key is lit - and stays lit while car is running. The ammeter needle is just below the 12 o'clock position (just below zero and steady) and when the fans come on the meter drops to -50 (all the way down).

Car has 1000 miles on it. Taking it to the shop next week - but was wondering what I may be to look at on my own. Belt seems ok.

It just started doing this after I had someone lower the idle a bit (don't know if this matters - and I was messing with the idle myself to put it back - and had no effect.

Any help appreciated - thanks.
Mark