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Hi my name is Robert..
Do you happen to know the series HWH system you have?
Let me see if I can find a service manual on this, HWH does a pretty good job on there manuals, when I read your question it makes me think that you have a bad solenoid valve, they use a 6 pack of them that are in the chassis, however this is an older unit and I am not 100% sure it was the same, let me see if I can dig up a manual on this..... Robert
Click HERE for a service manual and see if this helps you out at all, they do a pretty good job on there manuals. You will have a control box, you will see it in the manual you want to make sure no fuses are blown in that box as well. Robert
That sounds like a ride height valve issue if the travel light is coming on, but would be rare for two to fail at the same time, normally you have one per bag. I am going to take a better look at the manual I sent you and see if I can figure it out, it will take me some time to look at this to see if I have anymore direction.... I should respond by tomorrow morning. I want to take my time when I look at the diagrams and try to trace everything out. My feelings now are bad ride height valves, bad solenoid or bad control box.... Robert
See part 7 on this.....
Check the fuse for the travel solenoids. A blown fuse indicates a shorted wire or solenoid valve. Unplug one air harness at a time to determine which wire or manifold is shorted. Then unplug the travel solenoid to determine a bad wire or valve. If the fuse is not blown, check the corresponding pins in the control box for the travel solenoids. If +12 power is not present, replace the control box. If power is present check for power at the manifolds. Then replace the solenoid valve for any bag that will not reinflate.
Note: A bad height control valve can cause a ride height problem. If replacing a travel solenoid valve does not fix the problem, check for correct operation of the height control valve.
The manual should point you in the right direction, it mentions the solenoids make sure they are good to start.....
If the fuse is not blown, check the corresponding pins in the control box for the travel solenoids. If +12 power is not present, replace the control box. If power is present check for power at the manifolds. Then replace the solenoid valve for any bag that will not reinflate
ALSO At the top, it does mention if the system works in manual mode but not automatic mode the control box needs to be replaced.
I will put your question back up for other experts maybe another expert will have some input for you on this. My goal is for you to be satisfied with my efforts and I am out of ideas. Need to check the voltage at the solenoids. This very well could be the control box. Only other option I see if if you get a hold of HWH and see what they recommend, they do have phone support but normally work off a call back log. Maybe another expert on this site can assist you better.