this is the connector from a '89 Camaro, appears to be the same wire colors as the speedway 22 circuit
On the column side you should get continuity between hazard flasher wire and any of the stop or turn wires when the hazard switch is on. Measure resistance of the same circuit or hook a incandescent bulb in series to test the switch.
Or answer the questions about if it worked before the LEDs were put in