Well, I bought a cap and a thermostat and changed the cap straight away since it was easy. Guessing I'm going to need the thermostat, it's still heating up. Next up... where can I get a resistor pack? Anyone know the Toyota part number? Edit: Scratch that, I found the part number. Still, a Google turns up no one? Edit 2: Scratch that again, got one order from my local garage for next Friday.