Image is for illustration purposes only. Actual part may vary.

LST-3633

LOW PRESSURE BRAKE SWITCH NORMALLY CLOSED

This is a low-pressure air brake switch that is normally closed at 0 psi and opens when system pressure reaches 75 psi. It is commonly used in Mack and Volvo trucks to activate the stop lights or signal a low-air warning. When the switch fails, brake lights may stay on or fail to illuminate, indicating it's time for replacement. It threads into the air system via a 1/4-18 NPT port and is a direct aftermarket replacement for Mack OE sensor 745-275083.