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Old 09-16-2021, 07:19 AM   #1
dms
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Valid Air Question

Valid Air Question
I have a 2016 MA and am getting an intermittent red light "fault" indication on the rear axle. All six LED's light across the rear drive axle for a few seconds, then clears itself. Happens about every 50 miles.

I talked to ValidAir and the tech thinks it is a communication issue from the rear control box and he suggested to inspect the gray wire plugin at the control box for corrosion and clean it. He said the control box "should" be above the rear axle and has a yellow sticker on it.

Does anyone know exactly where it is located? I can hardly squeeze under to get to the front of the drive axle and can't find the control box.


Anyone had this problem?
Also, Any tips on getting under the coach other than trusting the leveling jacks?
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Old 09-16-2021, 07:36 AM   #2
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Quote:
Originally Posted by dms View Post
Valid Air Question
I have a 2016 MA and am getting an intermittent red light "fault" indication on the rear axle. All six LED's light across the rear drive axle for a few seconds, then clears itself. Happens about every 50 miles.

I talked to ValidAir and the tech thinks it is a communication issue from the rear control box and he suggested to inspect the gray wire plugin at the control box for corrosion and clean it. He said the control box "should" be above the rear axle and has a yellow sticker on it.

Does anyone know exactly where it is located? I can hardly squeeze under to get to the front of the drive axle and can't find the control box.


Anyone had this problem?
Also, Any tips on getting under the coach other than trusting the leveling jacks?
I think the control box you are looking for is in the dash. With multiple lights coming on that would be my best guess. One light might be a sensor, but multiple is a communications issue.

Not familiar with your coach, but on mine there is a dash control module in the dash. I can take the top plastic cover off mine, leaving the actual dash/instrument cluster in place. There is a couple of boxes in there. The sensors send a signal to the box, the box is then wired to the dash lights. I would look there.

As for getting under the coach with the jacks. The jacks WILL lift the coach off the ground but only safely on a level concrete surface. I was a little surprised when I got new tires that is how they did it. Put large aluminum blocks under the jacks, had me lift it up evenly all at once so all the wheels came off the ground at the same time.

Before I would get under it I would lift it high, using blocks under the jacks, then at least 6 3ton jack stands near the jack points. Two on each rear and one on each front. And then I still would be nervous. I might stack large wooden blocks under it in other areas, so it something failed I would have a backup.
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Old 09-17-2021, 07:17 AM   #3
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On my 2019 London Aire it is above the rear axle on the passenger side. It is a bear to get to but I had the same problem. There was no corrosion but after I unplugged and plugged it back in I never had a problem again (knock on wood)
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Old 09-17-2021, 07:55 AM   #4
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If you do find the control box, use some di-electric grease on the connectors before you reconnect it. This will prevent any water intrusion.
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Old 09-17-2021, 06:39 PM   #5
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Thanks for the expert guidance. I did locate the control module above the rear axle, and yes, it's a bear to reach. Tomorrow, I'll grab some dielectric grease and reseat both connectors. Hope I'm as lucky as Sramer. Thank you all for the assistance.
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