HELP RV Stuck, Rear Air bags won't inflate
Hope someone is reading the forum on this Superbowl Sunday. 93 Winnebago Vectra, front gas model with Jet Air Ride. I have not started it in about 2 years. Was bringing it to my house to go over ...
Forum Discussion
That Jet Level control system is not too complex. Troubleshooting from a wiring diagram is vastly easier that a word description, but here's the words:
Two power sources are used:
1. 30 Amp 12V power is supplied to the air compressor solenoid.
2. IGN (12 V) power is supplied to (1) the pressure control switch at the air compressor and (2) it is also tapped off from there and returned back up front to the AUTO / MAN switch on the Jet Suspension control panel at the driver's location.
The pressure switch uses that IGN power to turn the solenoid on and off to supply 30A power to the air compressor when necessary.
Up at the Jet Suspension control panel at the driver's location, IGN power applied to the AUTO / MAN switch is either directed right next door to the Left and Right manual control switches (when in MAN mode) - - or all the way back to the control boxes at the rear air bags (when in AUTO mode). Those control boxes use that IGN power to either add or bleed off air from each of the air bags. (It is just their operating power. Nothing more. They control solenoids with it.)
That "Compressor Running Light" on the Jet control panel is illuminated by a wire connected to an output of the air compressor solenoid. Every time the solenoid energized, that light comes on.
Considering just one of the control boxes at a rear air bags, it either gets IGN operating power when in AUTO mode or RAISE / LOWER control voltages on two wires (raise or lower) from the related manual momentary contact RAISE / LOWER switch on the driver's control panel. (These are actual control voltages, not just operating power.)
Now this description pretty much ignores the internal workings of those control boxes back at the air bags and how they determine level and add air and bleed air off as necessary to maintain that level condition when in the AUTO mode.
But if the solenoids at those boxes are working, you can go to MAN mode and adjust left and right air bag pressure to "get on home."
Assuming the system functions otherwise, of course.
EDIT: Also be aware that there are some differences in the wiring of this Jet system. Some of those solenoids at the lift control boxes are 9 wire types and others have I believe 10 wires. When ordering a replacement solenoid you need to know that.
Two power sources are used:
1. 30 Amp 12V power is supplied to the air compressor solenoid.
2. IGN (12 V) power is supplied to (1) the pressure control switch at the air compressor and (2) it is also tapped off from there and returned back up front to the AUTO / MAN switch on the Jet Suspension control panel at the driver's location.
The pressure switch uses that IGN power to turn the solenoid on and off to supply 30A power to the air compressor when necessary.
Up at the Jet Suspension control panel at the driver's location, IGN power applied to the AUTO / MAN switch is either directed right next door to the Left and Right manual control switches (when in MAN mode) - - or all the way back to the control boxes at the rear air bags (when in AUTO mode). Those control boxes use that IGN power to either add or bleed off air from each of the air bags. (It is just their operating power. Nothing more. They control solenoids with it.)
That "Compressor Running Light" on the Jet control panel is illuminated by a wire connected to an output of the air compressor solenoid. Every time the solenoid energized, that light comes on.
Considering just one of the control boxes at a rear air bags, it either gets IGN operating power when in AUTO mode or RAISE / LOWER control voltages on two wires (raise or lower) from the related manual momentary contact RAISE / LOWER switch on the driver's control panel. (These are actual control voltages, not just operating power.)
Now this description pretty much ignores the internal workings of those control boxes back at the air bags and how they determine level and add air and bleed air off as necessary to maintain that level condition when in the AUTO mode.
But if the solenoids at those boxes are working, you can go to MAN mode and adjust left and right air bag pressure to "get on home."
Assuming the system functions otherwise, of course.
EDIT: Also be aware that there are some differences in the wiring of this Jet system. Some of those solenoids at the lift control boxes are 9 wire types and others have I believe 10 wires. When ordering a replacement solenoid you need to know that.
