the very rear window in the hatch will not open, it will on occasion , so do rep on 2001 Toyota Sequoia

Do i replace the motor or is there some thing i could check first? also can u give me details on how to test the motor or what every part that needs to be tested, remember i an only shade tree mechanic so please give me some details. I need to get this window operational.

Asked by for the 2001 Toyota Sequoia
Utube it , maybe theres a video..