About a month ago I had the same thing, voltage drop, battery light, electrical glitches. I had to put the car in neutral at every light and rev the engine to keep it from dying. I'm thinking Alternator replacement... But then I remembered an electrical gremlin I had on my FJ55 oh so many years ago. After searching and replacing many things on that Iron Pig, it turned out to be the main grounding wire. I replaced that and never had an issue again. So on my LX470, I went about checking, cleaning and tightening all of the grounds I could find... Paying extra attention to the main one right near the battery. So far the truck has been running beautifully since that free "fix"... Everybody, Check your Grounds!
