Q: Seems to be a problem with electrical.

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Ok so, I start my truck up and it runs idles and drives fine, but it seems to be when I turn the headlights on it will start to bog out and lose power as you try to accelerate. Doesn't do it everytime. I've traced all the wires I could and can't find any bad grounds or corroded ones. So I'm starting to think the alternator is screwing up some how, but it keeps the battery charged. So from there I'm lost idk what could be messing with it bad enough to run fine with everything on but the headlights, but as soon as there on its starts running rough.

My car has 180000 miles.
My car has an automatic transmission.

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