How do you tighten the ac belt on a 1997 Nissan pickup?

SOURCE: replacing door handle on nissan pickup

Lift up the handle, you will see the bolts there, You will also have to pry off inside door panel (after removing any screws) than you will have access to the nuts. That's all there is to it.

SOURCE: does 1997 nissan pickup fuel pump powered by

Yes

SOURCE: 2005 Nissan Sentra 1.8S, with AC - how to replace belts?

first of all you don't have to loosen the pulley,this will no solve the problem,well you already loosen the adjuster,good,bot thing you have not done i will tell you now,on the power steering pump where the belt pass there is also a bolt that hold it ,you must loosen that also,then after you will see the pump moving on the two position that means you will see the belt loosen on 1 position an d the position it will tight the belt,try that man.............

SOURCE: how to tighten alternator belt on 83 nissan pickup

loosen the adj bolts and pry the alt to tighten the belt. if you are at the end of the slot, you will need a new belt.

SOURCE: tighten ac belt on 2004 montero sport

the tensioner keeps the tension, change it and your problem should be solved