if this helps at this point please PM me
ill set you up with what all you need here on the GREY TIP Sensor ...
thanks
matt
https://vintageteqparts.com/collections/electrical/products/oem-japan-switch-water-temperature-for-e-f-i-89428-14070-r-fits-87-90-fj62-usa-canada-spec
- simply because , 91% + of the time , based on your VERY WELL defined symptoms it actually is the fusible links and or the related CONNECTOR Plugs housings
are melted and 1 or more of the brass terminals are shorted out , &no longer make any current flow
- lastly , and maybe even more...
this is a real possibility ,,,,,,,,,
confirm and verify there all still good and making solid current flow
if your LINKS are faulty , i can and will USPS Express mail EMS you a new fresh set
let me know if i can help
matt