headlights seem to lose power and dim when I accelerate?

[WHITE AND RED 69]

My 1969 chargers headlights dim when I accelerate hard? They are fine when the highbeams are on, its only when its just the low beams. I'm terrible when it comes to electrical and not sure what to do.

[nascarxx29]

Accelerate hard lights dimming ? Alt belt loose? Maybe Loose or coroded connections bad ground.

[tan top]

can you hear a screeching noise , could be the  alternator belt slipping   

Do'h too late   

[WHITE AND RED 69]

There is no noise coming from the alt., Im going to check the wires tonight to see if any are bad. I'm hoping it will be something simple. Thanks guys.

[John_Kunkel]

Check the terminals at the bulkhead connector for corrosion, they're a constant source of problems from the firewall forward.

[mopar_nut_440_6]

Don't forget to check the alt belt as well. 

[six-tee-nine]

Does'nt mean the belt does'nt scream it aint slippin'

Check your ground wires from engine to body.....might be under full load (when the engine moves hard) that you have a bad ground...
Can't imagine the alt. being the problem....

[Ghoste]

What about a failing battery?  Or would that be more likely to show up as a misfire and dimming lights under load?

[WHITE AND RED 69]

Fixed. Thanks. 

[nascarxx29]

Whats was the problem 

[WHITE AND RED 69]

There was some corrosion on the ends of the headlight wires. There wasnt much but after I cut off and replaced the bad areas the lights stopped dimming.

[tan top]

thats good a simple fix