any images of your hazard switch connections and wiring

what type of hazard switch are you using (images please Hella etc )

so you have had a dent and paint job where about on the vehicles would narrow the problems maybe a disturbed connector unattached earth damaged or trapped harness a fuse blown or dislodged

take a gander

plastic tank hence heat shield maybe

Sorry not into circuit board diagrams but interested

may be of help

that the problem most of my images are around 3Mb and I'm unable to post them .the one's I post are re-sized and then further resized by the site in some cases view them in windows paint (as they are created in paint in PNG format as the colors don't bleed)

may help

Have you checked the right heated screen relay

try 1/4 BSF thread

The firing order is the same for the 3.5 and 3.9 (changes when fitted in the Range Rover )your set up is one position out from the reference point but the firing order is still 1,8,4,3,6,5,7,2 so is correct but your marking are out

have you a list of the parts and their numbers

assuming V8i are leads as shown

have you checked your piston with the drop test to confirm it's not stick ,what type Su is it

for those who are interested

was a similar drain problem was resolved with the Harman Kardon amp in the boot

try https://www.europeanservicecenter.com/4-reasons-why-your-land-rovers-airbag-warning-light-is-on-in-atlanta/ I believe the battery safety unit is like the BMW and fires a charge to disconnect some of the battery outputs in the event of a crash leaving the hazards and other critical systems...

Sumitomo Header used on most land rover models blue 6,4 ,6, 4 20 way male (64000014 ) and female (64090073),they separate to isolate the spliced cable affectively a means of joining harness cables in a 6,4,6,4 configuration. The grey is 8,4,8

have you tried enquiring at https://classiccarbs.co.uk/products/gaskets-service-kits/gasket-service-kits/