@GunStrauss said in Black Square Analog Baron Fuel Pump Lvars:

I can upload a profile when I get home in a couple of days, may I ask what controllers you use?

I'm not sure what you mean by "controller". I think my answer should be "None".
I have built a cockpit in which I have replicated the pilot's side of the 3D image you see in the Baron in FS2020. So I have physical switches connected to a Leo Bodnar board (BU0836X) and I am using SPAD.neXt to handle the switch inputs for me.

I have been busy researching and have got it working satisfactorily. I discovered that I have to turn on the correct electrical circuit as well as switch the pump on.

“A:CIRCUIT SWITCH ON:4, bool”, and “A:CIRCUIT SWITCH ON:5, bool”

So, for the left pump switch:

“Set LVAR:VAR_FUEL-SWITCH_PUMP_1 to #"; where # is the state of the switch. 0=Off, 1=Low, 2=High.'

and Set CIRCUIT_SWITCH_ON:4 to 1 (or 0 for off)

For the right pump switch:

Same as above except use “Set LVAR:VAR_FUEL-SWITCH_PUMP_2” and

for the electrical circuit use “Set CIRCUIT_SWITCH_ON:5 to 1” (or 0 as appropriate)

Everything is now working as it should.
Cheers!