In this video I am explaining what you can do with minimum (or no) tools needed if you do have all 4 airbags flat.

There is several possible scenarios what happened:
1. Airbag leveling valve linkage got broken/bent/loose. You need to straighten it/secure it back.
2. Airbag leveling valve got stuck. You need to disconnect the linkage from the valve and manually inflate the airbags by moving valve itself up to inflate or down to deflate.
3. Airbag leveling valve is bad it has to be replaced.

You can also use this if you need to manually lift up your trailer OR if you need to lower your trailer if you are going under low bridge.

After you got your linkage fixed or snapped it back, you should be safe to reach closest service location to have it fixed properly.

Contents of the video:

0:00 Introduction
0:15 Checking linkage
1:55 Manually changing trailer height
3:15 Other style linkage
3:59 Please subscribe