Headlights only work on High Beam - is it a fuse?

[Pretaco]

I didn't think that trick worked on toyotas, but maybe on turbo supras due to the style of maf.
Most toyotas don't start the fuel pump until the key is turned to start, then when the engine is running the maf has a switch that controls the fuel pump, so if the engine dies, the fuel pump does too.
But the supra turbo has a different style of maf, one that doesn't allow for the mechanical fuel pump switch, so it could have a different fuel pump control circuit.
The natural aspired engines still have the older style maf and so they probably work in the typical toyota way, whereas the fuel pump only works at "start" or when the engine is running.