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| Detail | Specification |
| Part Number | 223 (TUNG-SOL Corp.) |
| Part Type | Vintage Fixed-Load Thermal Turn Signal Flasher |
| Voltage | 12V |
| Terminals | 2-Pin (Standard Flasher Post Style, typically marked 'X' and 'L') |
| Load Type | Thermal Flasher (Compatible with Incandescent bulbs only) |
| Lamp Load Capacity | Fixed Load (Typically $2$ to $3$ lamps/up to $50$ candlepower). Essential for $1960\text{-}1966$ applications where it acts as a thermal fuse/load sensor. |
| Application Notes | Used for the Turn Signal function on a wide range of domestic vehicles following the transition to $12\text{V}$ systems. If the load is too high (e.g., if a heavier-duty 552 flasher is used instead), the safety feature of changing the flash rate/fusing capability is lost. |
| Make | Representative Models (Turn Signal Function) | Representative Years |
| Buick | All Models | 1961–1963 |
| Cadillac | All Models | 1963 |
| Chevrolet | Corvette, Impala, Full-Size Cars | ~1955–1965 |
| Oldsmobile | All Models | 1961–1963 |
| Pontiac | Tempest Custom, Catalina, Bonneville, Grand Prix, Star Chief | 1962–1963 |
| Ford / Chrysler | Various Passenger Cars and Light Trucks | ~1955–1965 |
