Seems to be an accessory for cars. If you want to use them, I would just add a relay and wire them up in parallel.

http://www.oldcarbrochures.com/stat...s/1939%20Chevrolet%20Accessories-04.html

Last edited by Gord&Fran; 08/13/2021 7:37 PM.
Gord 🇨🇦
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1954 1/2 ton 235 4 speed