HELP !!! Rear Diff Lock Trouble Light???
 

95 Montero SR, auto 4x4. in 2wh the right rear wheel light indicator will not light up....when switched to rear diff lock the rear diff lock light just blinks??? what does this mean...sensor bad, engagement bad, low fluid issues ???

second issue, the seat belt light stayed on for a long time....now went out ...wierd

third, both electric outside mirrors quit working.....bad position switch???

diff light issue most important, any help with possible meaning or cause is greatly appreciated!

thanks, Ed