Got the usual heater only works on position 3 problem on me dad's MK1 Punto, prob the resistor as usually is when losing all the other speeds but question is where to find it?

Did a search through the other threads and it's somewhere in the passenger footwell? Not exactly sure where to look though, any chance of a pic or some better directions

Thanks in advance, you guys have already helped fix the duff rear wiper so hopefully we can make it a double-fix