EXP L4-98 1.6L SOHC VIN 4 2-bbl HP (1985)
Brake Fluid Pressure Sensor/Switch: Description and Operation
Fig. 4 Pressure Differential Valve & Brake Warning Light Switch
Fig. 5 Pressure Differential Valve & Brake Warning Light Switch
Fig. 6 Pressure Differential Valve & Brake Warning Light Switch
There are four basic types of brake warning light switches as shown in Figs. 4 through 6 and usually form a common electrical circuit with the brake
warning light.
When a pressure differential occurs between the front and rear brake systems, the valves will shuttle toward the side with the low pressure.