I'm not 100% sure on your jeep, but the tensioner is the Power Steering pump and the idler is over by the AC with just a bold going through it...
Could be wrong, but the last cherokee I worked on was like that...


91 YJ
2 Seater Sand Rail
Handfull of other fun toys...
And a brand new, spit shined, B.S.
Oh, and a job to boot.