what year and model later models have l lighting relay controlling the main and dipped beams which are also fused. the side and tail are also fused separately the horn and flash are also separately fused so would check before replacing any items

just replace bolts with stainless security bolt, various types if you do not want the door off again use the shear head type thread lock is another and you could drill tap 4mm locking grub screw so the nut will turn with the bolt if tampered with

CIRCUIT

circuit

take a gander https://www.lrworkshop.com/diagrams/land-rover-defender-fuel-air-emission-systems/exhaust-gas-recirculation/valve-and-pipes_53444

sounds like the PCV is stuck open

may explain

As steve2286w said

trouble is I vacuumed most of the patina on the chassis and bulkhead up

try https://www.simplycoatings.co.uk/cellulose-topcoat-aerosol-mixed-to-gloss--colour-of-your-choice-400ml-1148-p.asp and I'm sure you will find there are many with varying prices this was a quick search

If you fit a https://www.ebay.co.uk/itm/272665874287 your flasher will work, fitted one to my series 1 so I could use the front side light unit for both indicator and side light with dual amber and white LED's and holder to suit and it works with no undue load and heat through resistors and...

I would get the battery's checked by someone who has the equipment to measure the cold crank current etc and knowledge of battery's not by a counter expert or a want to be land rover mechanic is not the eco reliant on the stop start battery

If you have access to a lathe you could cut the broken end of the removed part of the stud drills pilot hole through the centre and thread it back in the hole and use it as a pilot to centre the drill when you drill the broken off stud. think the thread is BSF unsure of the size so I would...

2001 RR322 some model may vary some items shown wiring diagram not shown in connection list mainly the radio and comm's hope they are of help

you had the battery checked was this in the vehicle what equipment did they check the battery with (load tester or volt meter) and you have checked that the battery connections are secure and tight

may help

lift plastic terminal locking cam with care no great force required ,you will require a pair of F crimpers (open barrel crimpers) to replace the damaged terminal but unlike the factory crimpers you will not achieve the clamp around the seal and cable

someone's got to pay for their moon lander ,good job it's one-way trip its a wonder it did not fall apart just like their spares

did not get the telepathic images what year and model is it

Try https://www.automotiveconnectors.com/3-way-te-connectivity-ssc-female-18mm070-key-a-black.html