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Level system check lite

Was bringing my 1997 U 320 ft home and hit a pretty good bump in the road causing front shocks to bottom out and immediately getting a amber warning lite saying check levelling system. Can not find anything about this warning in ft manual or system manual? Anyone?
Yellow lite is on the instrument pannel,
I was able to drive the rest of the way home,
It seems to be equal gr and held air fine.

Thanks Chuck and Jeannie.
Steven Green
1997 U-320

Re: Level system check lite

Reply #1 –
First guess would be to check the mechanical linkage rods on front ride height valve.  See if they came apart from the impact.

Would be helpful if you provide more info.

Where is the yellow light - on your instrument panel, or on the HWH touch pad?
What is status of coach after yellow light came on?
Are you driving, or parked?
Is coach sitting at normal travel height, or is one end sitting high or low?
Is air pressure holding at normal pressure, or are you losing air?
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Level system check lite

Reply #2 –
At different times I have had two of my ride height control valves fail internally after hitting hard, resulting in immediate loss of air in the bags.
Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: Level system check lite

Reply #3 –
Wire connectiona to air pressure sender/switch located on 6-pack may have triggered the low-pressure warning light on the dash.

Re: Level system check lite

Reply #4 –
Quote from: Doug W. –
At different times I have had two of my ride height control valves fail internally after hitting hard...
Doug,

You need to stop taking those speed control bumps at 60 mph!  ;)
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Level system check lite

Reply #5 –
Quote from: Chuck & Jeannie –
First guess would be to check the mechanical linkage rods on front ride height valve.  See if they came apart from the impact.

Would be helpful if you provide more info.

Where is the yellow light - on your instrument panel, or on the HWH touch pad?
What is status of coach after yellow light came on?
Are you driving, or parked?
Is coach sitting at normal travel height, or is one end sitting high or low?
Is air pressure holding at normal pressure, or are you losing air?
The lite is at bottom of instrument panel and we got it home fine. Just had the lite on. After sitting for a week it looks like the left front is sitting lower. Air pressure is fine.
Steven Green
1997 U-320

Re: Level system check lite

Reply #6 –
Quote from: Chuck & Jeannie –
Doug,

You need to stop taking those speed control bumps at 60 mph!  ;)


Lol, I swear I haven't taken any Topes at high speed... with this coach anyways,  that's a memorable experience!
No,  California's busted-up cement I-5 and a back road Missouri two lane got me.

Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: Level system check lite

Reply #7 –
Quote from: Sagre –
The lite is at bottom of instrument panel and we got it home fine. Just had the lite on. Air pressure is fine.
OK, If the system air pressure held at normal readings as you drove, and the coach remained in a normal travel attitude, then you most likely do not have a massive air leak, or a problem with the height control valves.

This makes Barry's comment sound like a good possibility.  The level system "Master Warning Light" gets its signal from the pressure switch on the rear 6-pack manifold.  If the system air pressure gets below 80-85 psi, then the warning light comes on, and the "Travel" light should go off.

Did you notice if the "Travel" light on the HWH control pad was illuminated as you were driving?

If your system air pressure is good, and the wiring to the rear 6-pack pressure switch is damaged or comes loose (as suggested by Barry) then the HWH control box will assume air pressure is low and the warning light will come on.

I would recommend a trip under the rear of the coach (with safety stands in place) to check the pressure switch wiring/connections.




1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Level system check lite

Reply #8 –
I think our HWH air pressure switch is on our front 6-pack, but not 100% sure. I remember when pressure switch wiring got wet, we would get an irregular air warning buzzer, so we sprayed it with liquid electric tape to water proof wires.

Re: Level system check lite

Reply #9 –
Quote from: Barry & Cindy –
I think our HWH air pressure switch is on our front 6-pack, but not 100% sure.
Two 10 psi switches on the front manifold...single 85 psi switch on the rear manifold.  Rear switch monitors system air pressure.

See the .pdf in my reply above.  AFAIK all Foretravel coaches up through at least the early 2000 models have this pressure switch arrangement.

Same info at beamalarm.com:

HWH Pressure Switch Arrangements
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Level system check lite

Reply #10 –
Quote from: Barry & Cindy –
Wire connectiona to air pressure sender/switch located on 6-pack may have triggered the low-pressure warning light on the dash.
Thanks I am in central Ohio can someone recommend a repair facility ?
Steven Green
1997 U-320

Re: Level system check lite

Reply #11 –
Quote from: Chuck & Jeannie –
OK, If the system air pressure held at normal readings as you drove, and the coach remained in a normal travel attitude, then you most likely do not have a massive air leak, or a problem with the height control valves.

This makes Barry's comment sound like a good possibility.  The level system "Master Warning Light" gets its signal from the pressure switch on the rear 6-pack manifold.  If the system air pressure gets below 80-85 psi, then the warning light comes on, and the "Travel" light should go off.

Did you notice if the "Travel" light on the HWH control pad was illuminated as you were driving?

If your system air pressure is good, and the wiring to the rear 6-pack pressure switch is damaged or comes loose (as suggested by Barry) then the HWH control box will assume air pressure is low and the warning light will come on.

I would recommend a trip under the rear of the coach (with safety stands in place) to check the pressure switch wiring/connections.






Yes that is the way it was the warning lite came and the travel lite went out but the coach ride was normal.
Thanks everyone.
Steve G.
Steven Green
1997 U-320

Re: Level system check lite

Reply #12 –
Quote from: Sagre –
Yes that is the way it was the warning lite came and the travel lite went out but the coach ride was normal.
Thanks everyone.
Steve G.
It is possible that the system pressure switch on the rear 6-pack manifold has failed.  If you (or someone else) determines that is the case, you might want to have a replacement available.  They can be somewhat difficult to find at local parts stores.  Link below to a post that lists several sources:

6 pack rebuild
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Level system check lite

Reply #13 –
Quote from: Sagre –
The lite is at bottom of instrument panel and we got it home fine. Just had the lite on. After sitting for a week it looks like the left front is sitting lower. Air pressure is fine.
One more item I noticed is now I get the air pressure low warning sound even though the pressure is fine..
Steven Green
1997 U-320
 

Re: Level system check lite

Reply #14 –
Steve,

I think the "low air pressure" warning sound is triggered by a different pressure switch from the one on the rear 6-pack, but I'm not sure about that on your coach.  The "low air pressure" warning is a DOT required safety feature that has nothing to do with the HWH system and "level" warning light.  However, it is possible that both warning device signals originate at the same switch.

You need to dig into your wiring diagram and see if you can find the location of any other air pressure switch.  On my coach the DOT pressure switch is located on the air lines attached to the "treadle valve" (the air brake control valve under the brake pedal).  The air lines (and switch) are underneath the coach.  They aren't too hard to reach on a GV, but on your coach might be very difficult to access.

I feel like both of these "warning signal" problems are probably related, but I can't think of a single failure point that would activate both signals.

Sorry.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"