Section 18-02: Flashers | 1993 Mustang Workshop Manual |
The hazard flasher system is operated independently of the key lock
cylinder. All turn signal lamps can be made to flash in unison by pulling out
the actuating knob of the hazard flasher switch located on the instrument panel
and marked with a "double triangle" symbol. 
Two flasher units are used. One unit is used in the turn signal circuit, and the other for the hazard flasher system. Refer to the Wiring and Vacuum Diagram manual.