Phase 3 cooling fans

[Pompeymj]

Thanks Niall, yes it is an AC model (forgot that bit). I'll post a pic of what we have and maybe someone can fathom it out. From memory there is only the one blue connector over the thermostat.

As for the large circular connector it's clean, not corroded and we took a complete cowling with loom, hooked it up and had the same result so I assume the loom and relays are ok by elimination.