Diesel fuel heater

Fuel heater stopped working last year,have took sensor off from behind bumper put it in fridge , put tester on & got a circuit . Shorted plug with engine running no heater.
Can find no sign of it on any wiring diagram.
Anyone know where fuses are as I can’t trace wire back & don’t seem to be getting any feed in

If it's a FL1 TD4 then fuse 5 of the engine bay fuse box is for the FBH.

Nodge68 said:

If it's a FL1 TD4 then fuse 5 of the engine bay fuse box is for the FBH.

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Will have another look but tried every fuse I could find

When you shorted the circuit did you hear the dowsing pump clicking away in the drivers side wheel arch?

Madmustang said:

When you shorted the circuit did you hear the dowsing pump clicking away in the drivers side wheel arch?

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Not sure will take sensor off again @ weekend & double check thanks

AaronSim said:

Not sure will take sensor off again @ weekend & double check thanks

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Just remember’d does the engine have to be running @ this point or just the ignition turned on

AaronSim said:

Just remember’d does the engine have to be running @ this point or just the ignition turned on

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The engine needs to be running, unless you have the timer or remote control option.

Nodge68 said:

The engine needs to be running, unless you have the timer or remote control option.

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Had engine running shorted switch nothing but have tested the three leads on other plug Got reading 6.55 on orange wire socket 2

Have you check the connector on the pump it's self?

You could do with checking the current across fuse 5.

Could be in lockout mode - see https://www.landyzone.co.uk/land-rover/fbh-all-you-need-to-know.207143/