If original, the fuse is in the headlight switch. A short or high amperage drawwould cause the lights to go on then off repeatedly. The switch has a bi-metalic strip that when heated up bends and opens a contact. Once cooled, which only takes a second or so, straightens back out and closes the contact completing the circuit. Thus the blinking lights.

Last edited by Phak1; 05/06/2023 12:29 AM.

Phil
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1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
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