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Old 01-06-2013, 05:24 PM   #1
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Air Pressure Sensors

I have a 2005 Discovery 39L, Freightliner Chassis, Cat 330 engine. I allowed the chassis batteries to discharge. While charging with charger, one of the batteries exploded. I replaced both batteries. When I started engine, the air pressure reading is zero. Anyone have suggestions as to where to start looking for the problem?
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Old 01-06-2013, 05:38 PM   #2
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Hello, Is the Coach airing up ok? just not a reading on the guage? I am just wondering when that battery exploded what kind of a 12vdc shock it induced on the whole system. Is the guage the only thing that is not working?
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Old 01-06-2013, 05:41 PM   #3
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Does it not build air after running for awhile?
If is does not can you hear air leaking anywhere? If you can, that would be where to start.
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Old 01-06-2013, 06:05 PM   #4
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Just got batteries replaced and found the air problem. Have not been under unit to check bags, but appear to be full. Electrical systems seem to be working. Other gauges working. Cannot release air brake. Air bag switch does not work.
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Old 01-06-2013, 06:05 PM   #5
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No air build up. Cannot hear any air noise.
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Old 01-07-2013, 04:49 AM   #6
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When I start my Coach up after about 5-10 sec. I can hear my air compressor load up and run right till the air dryer purges at the cut off point. Can you or did you ever hear your compressor when it was running. You are going to have to check all of your fuses in the whole system to start with. when that battery blew it might of took fuses out. For some reason your compressor is not loading up.
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