[ET250]

My SS 440 headlight dims the comes on brighter with no rhyme or reason i am sure its something simple but i am not the best with electrical any body know what to check for.

 

[zecow224]

what year and its probably just the rpms and the fly wheel. The higher rpms the more watts i believe. does it do it when you rev it up to?

 

[DoubleClutch]

Getting brighter and dimmer is the sign that the Reg/Rec has gone bad.

 

[ET250]

ya it has nothing to do with revs but whats the reg/rec and do you know of hand where its located

 

[DoubleClutch]

The reg/rec keeps the voltage at a steedy level and when they go bad it is running off of just what the stator puts out. This can burn bulbs out when the sled it running at a high rpm cause it is making more voltage.
It should be located on the foot well bulk head under the hood.