A water tanker driver on route to deliver water heard a beep sound from the vehicle, followed by the speedometer dropping to zero. He immediately parked the vehicle at the side of the road to check the issue when smoke started coming from the dashboard A/C vents. He immediately exited the vehicle and went for the fire extinguisher, but the fire broke out and grew quickly so he decided it was too dangerous to fight the fire so did not proceed. The driver noticed a third party water tanker passing and signalled for it to stop. With assistance from the 3rd party driver, they used the water from the 3rd party tanker to extinguish the fire. The driver did not sustain any injuries or burns.