Originally Posted by SHU-MAN-SHU
I wish my FBH had a dashboard switch so I could switch it off, tremendous waste of fuel on short journeys.
I have had a look at the circuit for the FBH and if you want to fit a dashboard switch to stop the FBH from starting this is how its done: locate the air temp sensor and connector, (behind r/h/s of front bumper) the connector to the sensor is co714, pin 1 (brown/yellow) is a feed signal from the engine control module (ECM) and pin 2 (slate/green) is the signal feed to the FBH, the temperature sensor is a normally open switch and closes when temperature drops to 5c when it closes the feed from the ECM flows through the switch to the FBH . So you can cut the wire (slate/green) going to pin 2 somewhere in the loom, extend both ends of the wire to the dashboard and fit a switch, as the feed is only a signal and not the power feed you can fit a low current switch, no need for a relay or a high current switch. Hope this helps.