well mech took another look today, he says faulty guage, coil fine, alternaotr charging right, all the loom he checked was fine (except temp guage still- he reckons is the sensor still).

so i pulled the guage and put my bog old one back in that i know works, just the light doesnt.... so im happy no more warning light lol.

as for temp guage, i got another new sensor (one shop wanted $74 generic with an adaptor fitting, and found one at another shop for $11..... new, correct for the L series and a series) n

i installed dash guage still went to H, so i pulled the dash again. havent tested yet but i replace the whole console and swapped the speedo over. 4 screws easy as.

I sat in car ingnition on for 5 mins- temp guage didnt budge. will test in the morning as too late to start and warm up car. I swapped the speedo into another console as i noticed some damage on the circuit board, and the other spare i had i know waorks as i swapped it out for this one when speedo seized.

Will report if it works.
I also added another earth from one of the backing screws on console to the cover to an earth point at end of dash frame. so that will make sure dash and console earthed correctly just in case.