Detail Specification Part Number 537 (TUNG-SOL Corp.) Part Type Vintage Heavy-Duty Thermal Hazard/Turn Signal Flasher Voltage 12V Terminals 3-Pin (Standard Flasher Post Style: X =Power, L =Load, P =Pilot/Indicator) Load Type Thermal Flasher (Compatible with Incandescent bulbs only ) Lamp Load Capacity Heavy-Duty rating, typically handling 3 to 6 incandescent lamps (e.g., 2 turn signal lamps plus 2 tail lamps for hazard, and the indicator lamp). Application Notes
Primarily used for the Hazard Warning Flasher socket (not the turn signal socket, which is often 2-pin) on domestic cars and trucks
Make Representative Models (Hazard Flasher Function) Representative Years General Motors (GM) Full-Size Cars (Impala, Delta 88, LeSabre, Eldorado), Camaros, Firebirds, Chevelles, and C/K Series Trucks ~1960s - Mid-1970s Ford / Mercury Full-Size Cars (LTD, Galaxie, Marquis), Mustang, Cougar, and F-Series Trucks ~1960s - Mid-1970s Chrysler / Mopar Plymouth, Dodge, Chrysler Full-Size and Mid-Size cars (Coronet, Fury, Charger, Dart) ~1960s - Mid-1970s
