Right, the WI pump O/P is pins 1 & 3 of the connector adjacent to the main connector on the SECS PCB.

It's not a pair of contacts as I'd hoped, it's a +12V and GND. So a relay or other circuit will be required. According to the manual the max current is 200mA and the circuit is UNPROTECTED.

Just looking for a suitable relay now

Note that the minimum setpoint for the ACT is 20deg so this won't work if your charge temps are below that.

Neil.