You may want to check the fusible link off the positive side of the battery. Other than that I couldn’t be much help. Sorry.
There are schematics and manuals on here for download.
That was Canadian funds, probably about $1000 US.
1st photo is right side rear of door opening. 2nd is the left front fender lip.
3rd is the left side lower rear door opening.
For Sale
https://spokane.craigslist.org/cto/d/porthill-1990-hzj-diesel-landcruiser-zx/6806359326.html
Easy to import at border 6 miles south of us. Two forms and 3% duty.
Runs great and good on fuel.
ZX model has many extras.
$13,000 US or $12,000 US without wheels and tires.