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Fram: PS9330
Haldex: 800405K
Caterpillar 1R-0716
Coolant or charge-air-cooler hose chafing against adjacent components
Verify your brake assembly type
Freightliner FSC1749-2134 Low Air Pressure Switch – Normally Closed 10 Speed Fram: PS9330Genuine Freightliner OEM low air pressure switch (FSC1749 2134) used in the dash air cluster warning circuit on Freightliner heavy duty trucks. The normally closed contacts open at 26 PSI to drive the low air buzzer and disable cruise control before the supply tank can drop into an unsafe range. Crosses to Freightliner 17492134, PAI 740250, and Automann 577. 46604. Signs You Need a New Low Air Pressure Switch Low air warning buzzer sounds
