wiring reference if needed

I would attach the wiring away from the belt pulley

see https://www.landyzone.co.uk/land-rover/td5-disco-2-maf-and-ambient-air-temp-sensor.365120/

TRY

may be of help

Try

TRY

may help

just because it shiny and new does not mean it's working ( could be a Chinese interment camp rebelling against the lose of body organs )

TRY https://www.scparts.co.uk/en/land-rover/land-rover-90-110-and-defender-1983-2006/body-panels/vehicle-cab-back-panel-and-floor-panels/

try ORA https://www.repco.com.au/parts-service/driveline/centre-bearings/ora-free-wheeling-hub-suits-hzj105-78-79-series-ora-901s/p/A8784119

try

try your pocket then we will all be safer

as the screen leaked check headers for water and corrosion the head un plugs to check them but care is required when re-inserting

have you checked the relays and header for water ingress

check the lighting switch for feed to front side lamps ( 7) as the terminal may have become detached as the front and rear are on different terminals

you will find that when you strip it the chassis will collapse in the centre so be careful how you support it my series 1 chassis ended up in the pile shown and the rest in the vacuum cleaner

try

have you checked fuse 13 engine compartment,fuse 21 passengers compartment

try