The idler pulley is between the alternator and the A/C compressor.
I don't believe there is an idler pulley on that model, just a tensioner pulley
The idler pulley has nothing to do with the brakes. If the idler pulley is bad it could throw or break a belt, and then your engine will stop.
In an Inline 6 Jeep engine, the idler pulley is located to the right of the A/C pulley. It is a smooth pulley, not a grooved one.
The A/C compressor is located on the bottom of passenger side of the engine. It is the unit between the crankshaft pulley and the idler pulley. It is driven by the serpentine accessory belt.
I assume you mean the idler pulley on the A/C belt. I have not replaced this particular item but it should be simple. Looking from the top of the engine compartment on the passenger side you will see the idler pulley with a mounting/locking bolt which attaches the pulley and the tension adjusting point immediately above it. Loosen the pulley locking bolt by turning counter clockwise. Relieve belt tension by turning the adjuster bolt counter clockwise. Remove the belt and pulley. Replace in the reverse order.
Remove the belt, then remove the bolt holding in the idler pulley.
If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.
Replace the tensioner assembly as one piece.
Remove the old, damaged idler pulley and replace it with a new one.
An accessory or idler pulley is frozen or in very bad shape and is snapping the tensioner and bolt from all the torque being applied to it. Check all your pulleys when you have it off. They should rotate freely.
open the hood, pour a gallon of gasoline into the engine compartment...then throw a lit match into the mix.