From what I have read up on , this is the norm for headlight wiring below , doesn't mean I did enough research , just what I have read , but if I have issues I will change out and use a better 14 gauge ground wire to see if it resolves an issue as you describe , I do have one installed on my 79 f100 with better halogen lights and haven't noticed a hotter than normal wire but will check better to see if it has issues after running longer than I have before , on the 72 Duster I am going to use JW Speaker led headlights , and will be checking those more closely when I get to try them out for the first time
- 18 gauge wire for the high beam
- 16 gauge wire for the low beam
- 14 gauge for the ground connection.
