there are 4 switches that are similar for headlights, fog lights, rear defrost and hazard. the headlights and fog lights are on the left side of the steering wheel. rear window defrost and hazards are on the right side of steering wheel.
on the driver's left side
open the dash and feel to the left it is in there
The switch is located on the driverside just past the fuses towards the break pedal.
The diagrams for the wiring of the ignition switch on a 1990 Ford Mustang 5.0 can be found on a website called Sbf Tech. Many of the other wiring diagrams for the 5.0 can be found there also.
The brake light switch is located on a bracket behind the brake pedal support.
it is located on the transmission itself
On the steering column????
I have a 94 mustang and the switch is in the trunk, left side by the brake light. You can see it as soon as you open the trunk and look on the left side behind the brake lights. Maybe yours is located there too. Good luck..
The fuel pump inertia switch is located behind the interior trim panel in the trunk that is covering the left side tail lamp bulbs. It should have a black rubber plug in the panel that will pull out so you can reset the switch without removing the panel.
The coolant fan switch is located close to the thermostat.
The 1990 Ford Mustang 2.3L SOHC had 88HP
USAAF Mustang was created in 1990.