[Richard]

First me thinks you got the wiring reversed in your hot wiring diagnostic. Easy to do.

Are you willing to do some diagnostics, because I am having a hard time understanding what you are describing with dropping in travel mode.

With the engine running, and the coach in travel mode:
Does the coach come to the proper ride height?
What pressure do you read on the pressure gauges at the front?
If the coach does not come to the proper ride height please describe what it does.

With the engine off, but the key in the on position.
Starting with the coach at ride height.
Does the coach stay level? If not describe what happens.
What happens with the air gauges in the front? Important to comment on all both the brake and supply.
Do you hear air escaping at any location.

With the engine running and coach at ride height, place the coach in LEVEL mode, but don’t press any other buttons.
Does the coach stay level?
What happens with the air pressure gauges?

Last data.
Leave the coach in level mode and turn off the ignition.
What happens with the pressure gauges?
Does the coach stay level.

Here is a tidbit that will help understand why your hot wiring was not helpful. All of the travel solenoids are tied to the same terminal in the HWH control box. So when you energize one, you energize them all.

I can help if you will answer the questions above, cut and paste, write the answer by the question.