How do you put fan belt on a 78 jeep wagoneer?

To put a fan belt on a 1978 Jeep Wagoneer, first ensure the engine is off and cool. Loosen the tensioner or alternator bracket bolts to allow for slack in the old belt and remove it. Route the new belt around the pulleys according to the belt diagram, ensuring it sits correctly in the grooves. Finally, adjust the tension by repositioning the alternator or tensioner, then tighten the bolts to secure the belt in place.