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Old 05-09-2021, 06:46 PM   #1
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2019 Interstate Lounge Ext
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Air Ride Suspension

My air ride suspension compressor runs intermittently for a few minutes intermittently when engine is off and vehicle is stationary. Is this normal? If so how frequent would be reasonable and will this drain my battery?
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Old 05-09-2021, 07:29 PM   #2
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Sounds like an air leak.
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Old 05-10-2021, 08:11 AM   #3
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You have both an air leak and improper wiring. The compressor should only run when the ignition is on. It will drain your battery if you leave it like it is. Mine was fed by a 12 gauge yellow wire running from the GM fuse block under the dash. The wire was way too small for the amperage draw and had melted the insulation and heated up the fuse block enough to damage it at the connection there.

I ran a heavy wire from the battery box to a solenoid and used the original wire to switch the solenoid. Now my compressor is powered by a wire of appropriate size for the amperage and it is properly switched by the ignition.
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Old 05-10-2021, 11:41 AM   #4
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Sorry, I didn't look at your info and assumed you had a classic. Disregard my bad information!
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Old 05-10-2021, 12:29 PM   #5
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On our RAM 1500, the air suspension does run (albeit very intermittently) when the key is off. Like when I throw a bunch of stuff in the bed, it will run for a moment.
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Old 05-10-2021, 01:05 PM   #6
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How often is intermittently? Most air suspension units will leak off over time but it will normally take a few days or more before the compressor needs to run.
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Old 05-11-2021, 04:50 AM   #7
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Quote:
Originally Posted by tbrowne View Post
How often is intermittently? Most air suspension units will leak off over time but it will normally take a few days or more before the compressor needs to run.
Poor wording on my part. Maybe a better way to word it is "it stays active while the vehicle is off". If I throw something heavy in the back, the air suspension will activate and levels the vehicle. With the vehicle off, I can also use the keyfob to lower the vehicle for entering.

Must say we love the air suspension. Car and Driver reviewed it and said a RAM 1500 with air suspension rides better than many luxury sedans it has tested.
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Old 05-19-2021, 02:42 PM   #8
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Quote:
Originally Posted by dmacpmac View Post
My air ride suspension compressor runs intermittently for a few minutes intermittently when engine is off and vehicle is stationary. Is this normal? If so how frequent would be reasonable and will this drain my battery?
Hi

You will flatten the battery doing that. I agree that in this case it sounds like you have a leak.

Bob
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Old 05-23-2021, 11:14 AM   #9
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Quote:
Originally Posted by chiefair View Post
You have both an air leak and improper wiring. The compressor should only run when the ignition is on. It will drain your battery if you leave it like it is. Mine was fed by a 12 gauge yellow wire running from the GM fuse block under the dash. The wire was way too small for the amperage draw and had melted the insulation and heated up the fuse block enough to damage it at the connection there.

I ran a heavy wire from the battery box to a solenoid and used the original wire to switch the solenoid. Now my compressor is powered by a wire of appropriate size for the amperage and it is properly switched by the ignition.
I did the same on my 1992 P30 based 36 LY. Fuse box was damaged to the point that the compressor would not come on which left me with the suspension down and my bumper in the dirt until I could power up the compressor. Adding the relay and proper wire size from the battery to the compressor did the trick. Just needed to find a better switched DC since the original connection was no longer usable. Everything works perfect now.

Not really related to this OP's situation but still a common problem that others may want to know about.
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