If it's like a '54 the headlight ground attaches to the inner fender. Clamp a jumper cable to the inner fender and the negative terminal of the battery and see if it makes any difference.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.