Toyota's weak spot has been revealed!
we all know certian manufacturers have weak points in their equipment, after having only two Toyotas for 4 years, I have found theirs.
even the Japanese themselves (both my cars were made in Japan) can't get it right all the time
carefully check all electrical connectors in toyotas over 8 or so years old. 80's designs are especially succeptable. toyota used especially thin wiring and connectors in various parts. I have had several electrical faults take out various components, including an alternator. look for green corrosion inside wiring harness clips, even in places water would not normally penetrate.
a well sealed taillight from a japanese made 4Runner rottedinside the plastic clip.