I am newb, here me.....ask..... On a '80 FJ40, when at idle, the lights are very dim. If I rev up the engine a bit, they get much brighter. It has an optima battery that tests good. Could it be a voltage regulator or do these rigs even have that? If so, where is it located and how can I test it? Can you help out a newb so I'll stop asking dumb questions?