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The alarm for low air pressure keeps going off, but the air pressure is good. Every time the alarm goes off the brake light also comes on. Any suggestions?
Optional Information: Make: Frieghtliner Year: 2007 Engine: mercedes Already Tried: First time it happened we changed a relay located at rear axle and that fixed the problem, but not this time
Hi my name is XXX. X will try to help. It sounds like you have a low air switch that is defective or the wiring in your harness is shorting together in those circuits creating your problem. Check your harness for any bare insulation or shorted connections and check continuity at your low air switch using a digital meter and testing OHMS across the switch while dropping your air pressure down from full while monitoring when the switch engages ( should be around 60psi) Let me know if you need further assistance. Thanks for using JA
Experience: 1995 Wyo-tech graduate 17+years shop/field experience/on all major brands of heavy equipment and trucks.