I would check the continuity of any ground wire in your dash harness especially relating to your dash lights to chasis ground. You should read very low resistance.

I would think if you had any issues around your alternator, your headlights would dim out with your dashlights.

 

im dealing with the problem right now. RonJ is VERY helpful. PM me if you need anything. I took some pics...just lazy to upload them lol.

 

yeah i got it fuse 15 was blow and i found the wire behind it was melted about 3 inches back from the fuse box so i replaced that section of wire and now it seems to be working fine i hope everything holds up... thanks for the help guys

-sean