Vehicle Button Quiz

[Plasnart]

Knob on the right is a throttle hand control for use off road when the going is slow & bouncy. Keeps you from bouncing your foot up & down on accelerator pedal & 'jerking' forward. Push accelerator pedal down to get desired revs, pull out knob & turn to lock it. You can then take foot of accelerator & maintain revs. It's a good idea that used to be common, but seems to be missing from many modern 4wds. Dunno what RR Heater switch does, don't have one in my car.

I think thats what a few use that for Ian, but I believe its was actually intended for was the use of PTO driven devices. Not 100% sure though.

Yeah could be used for both. Basically to keep engine revs constant. In my childhood saw milk cockies using this function to keep vehicle driving slowly through paddock while dishing out feed from the tray. Not worksafe approved these days I'm sure, been many a farmer driven over exiting or trying to re-enter.