Welcome to the forum
. I had a 97 Adventurer before my current rig and it was a fine coach.
As others have indicated, the converter/charger is under the galley...probably under the fridge. Mine had a removeable panel under the fridge for access to the converter.
Suggest you consider using the Super Coils if you replace the coil springs. Sagging front ends is a common problem in the P-32 chassis and the air bags are not great to begin with. The super coils will replace the springs and bags and you won't have to worry about keeping air in bags.
Finally, you probably have the 454 engine in that coach which does not have an electric cooling fan but a belt driven radiator fan with a clutch. If you are running hot at idle, suggest you have the cooling system checked thoroughly, including the radiator.