Well i'm still waiting for Berger Camping and Yodel to work out who has my parcel...
However i did manage to find the correct relay and test the 'fans on without ignition' approach. Basically you inject 12 volts on the output pin (87) of the...
It's an electric one so plugged into a socket on the outside of the garage (or even inside if i feel all fancy) and then just a Hive remote control plug (or just a time plug) to switch it on. It triggers the blower fans when the coolant is hot...
Clearly i need my head examined, but looking forward to chillier days i've taken the plunge and bought a Webasto top 20 electric preheater. I don't really need it apart from at home so the electric route seemed sensible.
Waiting for the...