What are these dashboard lights on ACCO?

Looking at my ACCO they would probably be engine oil pressure and low air warning, usually in tandem with a buzzer that sits under the dash but maybe disconnected.
The switch that operates this is mounted on the back of the air pressure guage. I had to replace mine as it had corroded and wouldn't work. They are easy to get brand new from IVECO. The switch on the treadle valve should be for the brake lights.
Daryl.