The alternator warning light comes on intermittently on this new (06) truck, stays on for a few seconds, or a few minutes, goes on & off erratically like that for anywhere from a minute or two up to 10-20 minutes - then goes for long periods without coming on at all. Happens at idle as well as freeway speeds. So far I haven't had a dead battery or any other problems, because it doesn't seem to last long enough to affect the charge or the engine. Sometimes if it's cruising at freeway speed & the light is on, it will go off it I touch the accelerator a little harder, so it does seem to be a charging problem, rather than just a simple problem with the light.
This looks like one of those electrical things that's going to be hard to find. I'm wondering what to look for.
Any ideas?