I know this doesn't have to do with an f150 but I have a 2001 sunfire that has been acting weird. Everytime I give it acceleration the lights on the car dim

 

Ground problem check ur ground wires

 

lol

 

What's so funny about that

 

I think he is referiing that everyone who posts an electrical problem is replied with , "it's the ground".

 

Seems that u.have said something about everything I post stay out of my way I.have spell check on my phone so it has a mind of its own

 

This doesn't make any sense. How does spinning the engine up, cause the grounds to lose connection. Unless you were driving down a bumpy road all the time and the wires were constantly being bumped. A more likely culprit is your alternator is losing voltage when you spin it up. So if your alternator is putting out ~14 volts at idle, your headlights are happy. But if your alternator is losing that voltage when it spins up, you'll be reverting to ~12 volts, or whatever the battery has in it. Which will cause them to dim.

I would start by checking that. Just my guess.

 

Ur ground will heat up if its loose

 

I guess I should have told you this. Alternator and battery are good. Had them tested at an auto parts store. While I had the alternator off I replaced the belt thinking that might help and I have never changed it. But as you can tell the belt was a no go but the car needed one anyways. I thought the exact same thing. I was like it's got to be an alternator but I'll test it before I spend a 120 bucks