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Old 05-18-2014, 09:49 AM   #1
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Air Gauge Grief

Was poking around up front on the coach, and unpluged the plug for the air guage. Everything was working absolutly fine, really want to kick myself for unplugging now that I have this problem.

Well immeadiatly the low air sensor started screaming, so pluged it back in. The screaming never stopped, and now the air guage is not working.


Did the reset of all the guages from the console on the dash, and also did the auto test of all the guages. Guages are all working correctly. There is plenty of air in the system, brakes work fine, and hooked up an airhose to see whats in the tank, pleanty of air.

Know its something simple that I am over looking, tried turning rig on and off a few times, no luck. Scrolled through all the diagnostic stuff on dash. Just not sure what else to do to get the air guages working correctly again.

Please advise.
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Old 05-18-2014, 10:19 AM   #2
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Contact Freight Liner. They offer 24 hour technical assistance.
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Old 05-18-2014, 10:32 AM   #3
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Never thought of that Clay, I am Spartan not Freightliner, but will do that right now, thanks.
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Old 05-18-2014, 11:51 AM   #4
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You might want to clean the contacts on the plug or just wiggle it a bit. It sounds like it's not making a good connection .
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Old 05-18-2014, 12:22 PM   #5
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The enemy of good is better.
If it ain't broke - fix it until it is. Sorry, couldn't resist.
I like the advice to disconnect, clean the contacts and re-plug.
Consider disconnecting chassis batteries for a few minutes and reconnecting.
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Old 05-18-2014, 12:36 PM   #6
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Quote:
Originally Posted by hawgguy View Post
The enemy of good is better.
If it ain't broke - fix it until it is. Sorry, couldn't resist.
LOL im with you here.

My first thought was to clean all the contacts, work on seating, etc. No luck. Called Spartan, they were not helpful at all, nice guy but no clue what the problem could be. Emialed them the pictures, on call guy says he will check out and call me tomorrow. So guess Ill find out tomorrow what I messed up.
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Old 05-18-2014, 12:48 PM   #7
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Pull the plug off again. Take another picture with the plug off, or stick your head up there. See the type of contact and if any have been pushed in. If so, it may just be a snap in contact and you can set it back in. Check the unplugged side also for the same thing.

If all looks good, seek some very good technical service.
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Old 05-18-2014, 09:08 PM   #8
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"If it ain't broke - fix it until it is."

I'll to this. If you don't know what it does, don't monkey with it.

Have you done the master reset i.e remove all power? Remove AC and DC power to do the master reset.
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Old 05-19-2014, 08:49 AM   #9
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Kill all power to the coach. Disconnect house and chassis batteries, not just the switches, the battery cables. I'm betting a full reset, stuck relay! If you just turn the batteries off you still have power to some systems on the coach.

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Old 05-19-2014, 09:57 AM   #10
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I'm with Len. Unhook the batteries. For a total reset.
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Old 05-19-2014, 10:20 AM   #11
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Since he is talking about a dashboard/chassis function, disconnecting house batteries won't help a bit. And disconnecting chassis battery seldom helps this sort of thing, since cycling the ignition removes gauge power and causes a power-on self test anyway.

Your air gauges read zero psi, so of course the low air alarm goes off. Are you sure you didn't disturb the gauge air lines as well as the wire plug? You say you have air pressure in the system, but apparently no air pressure reaching the gauges.
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Old 05-19-2014, 10:27 AM   #12
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What are those two black tits sticking out of there that don't go anywhere?
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Old 05-19-2014, 01:02 PM   #13
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Quote:
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What are those two black tits sticking out of there that don't go anywhere?
They are plugs used to fill up empty holes in the connector. Widely used in the electronic industry
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Old 05-20-2014, 05:51 AM   #14
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The fact that both front and rear air aren't working tells me it's more than a bad connection. Usually those plugs have a key that prevent it from being plugged in backwards, but is it possible it's in backwards?
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