Newell Gurus

An air solenoid is mounted below the air dryer in the engine side compartment (see photos)  Has two 1/4" black air lines and a red & black wire going to it.

Does any one know what its function is???

On my 93 coach the solenoid for locking the rear axle is in about that same position, it also looks about the same as the one in your picture.

Alie got it!

Rear differential lock

You guys are the best!!! Mine was leaking so I thought I should at least know what I was replacing.