and won't change.
The rescue rover goes right to off road height when started and working the switch won't convince it to change to normal or access. A reset and re-enable with the Gap drops it down and then it goes right back to off-road.
Disconnecting the switch throws it into suspension failure mode, with the symbols lighting up, special programs not available, etc. Is it worth trying to clean the switch panel? The HDC switch was also kind of sticky.
The rover does go to off road height, but slowly, so a new compressor is in the plan. Won't go over 217 psi.

 

217 PSI is fine. I believe it used to be closer to 250 but a software update lowered the cutoff to extend compressor life or something like that.

If you have no faults, yes clean the switches. With no faults then something must be commanding it to go up. I think you can check live data of the switches with the GAP? Otherwise off-road height is cause by the truck thinking it is stuck on something, but that can also be caused by a bad calibration or even a stuck closed/restricted exhaust valve. It is also worth inspecting the sensors. Each is unique to their respective corner and can not be swapped. Lastly I have seen this happen with valve blocked are installed incorrectly or swapped front to rear, etc. Only OEM valve blocks should be used as most aftermarket as sold as interchangeable, when not, and cause issues.

 

Doesn’t it go to Extended Mode if it thinks it’s stuck?

…my money is on a bad switch. You said the HDC switch is sticky. Did someone spill something in that area?

 

Yeah, maybe you are right. I was thinking if in standard it simply goes to off-road first. And if in off-road, then it goes extended.

 

it wouldn't surprise me at all to find something goopy in there. This evening's project will be a good cleanout of that switch pack.
Checking the live data would also bo a good idea-that's why I come here for sure. I think the height sensors are OK, as the display shows the corners correctly. No extended mode unless I have the wheels jacked and hanging. Thanks for the ideas!

 

This is what I found in my "sealed" switches, corrosion. Had to flow some solder on the bad pad which seems to be hold up well. Your switch contact pad may be corrosion welded onto the PCB pad.

 

This was what I found when I opened it up. That much corrosion could definitely cause some wierd issues! I cleaned it with QD electronics cleaner and a toothbrush, and it looks good now. I'm considering touching up the solder on the pins but I don't see any rings around the pins, might leave them be and see how it works and can revisit that if it seems prodent.
My button pads looked OK but a touch of solder like you did might be prudent.

 

Please let us know how it turns out!

 

so, good gnus and bad gnus.

After cleaning the switch panel, the rover defaults to normal height.
However, once one invokes off -road height it won't return to normal and wont go to access, a check of the live values in the Gap tool reveal the lower switch is not making contact while the upper one is (thanks for the tip on checking that!) aaaaand I have 4 soldering irons, a soldering gun and a neat little torch for when I really need to get the heat going for ham radio antenna work, but I can't find a single one of the damn things. Even found my solder fer cats sake. Thats a first world problem right there, and I'll figure that out.

At least the HDC button doesn't stick and the other levers move smoothly. There was a ton of crap in there, 16 years worth of coffee and soda and who knows what else.

 

Progress is progress and the guess work is done.