1985 Airstep parts

[mrkane1952]

Greetings all:

I have obtained replacement parts to repair my ailing airstep, but
none are the same as the originals, leaving me with some questions.
The new relay/control assembly has all black wires, but the two
solenoids are separate, so it is easy to see which wire goes to which
solenoid. On the original control, all the wires emerge from one end.
The hot wires from the coach are red and yellow, but I can't tell
which should go where on the new controller. Any help?

What is recommended for replacement air lines?

Thanks--

M.R.Kane
1985 PT40
currently Pilot Point, TX