no EBAY in general it's becoming a Chinese wholesaler buy cheap sell high with the union flag and put the Land rover or classic in front and the greed escalate to another level

have you checked for water ingress on sunroof module

the connector is basically a male and female connector try https://www.automotiveconnectors.com/20-way-sumitomo-hm-splice-female-23mm090-blue.html you can find them on EBAY but some of the prices are greedy, to remove and replace the crimps just a matter of bending the retaining tab back but...

Hella ,Bosch and other do Solid State bladed Relay but they are not cheap but still prone to crappy spade relay bases ,on my series one I fitted a 6 way relay base form a LDV van which has the spring contact connections .the early SSR would switch at 3 volts upwards flat battery or not so...

the problem with the relay could be the actual relay holder at the end of the day they are just spade connections and loosen over time and the more you wiggle them the looser they get as they are retained by a simple barb on the back of the spade simply bent outwards to stop the connection...

on my 1957 series 1 the glow plug have been replaced with 12 volt type ,resistor removed and the relay is mounted on the bulkhead behind the speedo panel with cable from relay coil supply to the warning light ,safe from water ingress and protected by a 50amp maxi fuse on inner wing panel just...

it may help

yes they are just Indian scam merchant at those prices

may help

remember you will need a relief valve or the flow will take the easiest path the bypass there are several fitted to saab vacuum type https://www.ebay.co.uk/itm/271023467501?hash=item3f1a41ebed:g:fgEAAOSwft9asRQD r , cable operated...

I recall this being a issue on the mark 2 golf where someone was supposedly scolded when the heater matrix ruptured and they recalled them to fit the bypass and pressure relief valve to eliminate the problem take a gander

may help assuming it a 16ACR you fitted

if you go down the non rivet counting path

remember if you obscure the registration plate the plod will be pulling you over unless you fit a tail board

have a browse

take a ganderhttps://www.landyzone.co.uk/land-rover/steering-angle-sensor-replacement-guide-with-pictures.312092/

not sure if this covers your year but may help

take a look at https://www.ebay.co.uk/itm/204296018725

which radio do you have low ,medium or high, the purple is a permanent supply to hold the memory its the white/pink that activates the radio via the ignition hence the test A check looks for these .you can try a temporary link to the white/pink from the purple and this should fool the radio...

see attached