One day my car would not crank over, so I figured I left on a lamp or something. I got a quick jump start and was on my way. DON'T EVER DO THIS. Turns out my alternator was no good, and I got about 2 miles and then all hell broke loose. The dashboard went absolutely nuts, the car would hardly move and the transmission was hardly working. It died right in the middle of the road.
These cars are extremely dependent on having electrical power. Once it goes below a certain voltage level, forget it. You might as well just get out and walk.
The dumb thing is that with all the friggin bells and whistes on this car, the one thing it doesn't tell you is if the voltage is too low !!!!!!!! A separate volt meter is a good idea I am thinking.
By the way, the alternator lamp is turned on by the alternator itself, if I am not mistaken. what a dumb system, to rely on a broken part to tell you it is broken. I was actually thinking of a way to tap into that lamp and create a circuit that would turn on the lamp if the voltage was too low. But it hasn't gone past the thinking stage
Hope this helps