1992 Landcruiser

Thank goodness mine was my front right caliper hung up causing a bind on the drive line- forcing my landcruiser into differential lock mode. I was stressing on the cause- until I realized what it was- and fixed it in no time at all. every time I would try to turn my wheel- it would make a god awful sound in the drive train. I had just pulled off the highway to get some gas. from stop sign, I realized that my differential lock light was on. quickly trying to push button in hopes of disengaging it to no such luck. after I managed to get it off the road, I called a flatbed wrecker to retrieve it and return it home for inspection. I took out the box in the drivers side kicker panel and took it apart and tested it per FSM. after realizing it wasnt this- I went and checked every connection and wire for problems and found none. Then I started to worry that maybe it was mechanical and a possible break in the drive train- i jacked up the FJ80 and removed front tires to start inspecting drive line components- It was then, that I found my front right caliper was missing a stud and was out of alignment. turns out- it was binding with my rim and wore into rim - causing farther problems. Needless to say, I installed a bolt and installed my spare tire and fired it up and drove it to town with no farther differential lock problems.