How do i release tension from a stuck seat belt for a 01 ford f 150

Edward sounds like a stuck counter weight in belt retractor, links below should help. PRESS THE HELPFUL BUTTON

How to Release Locked Seat Belt

HELP Seat belt Locked up Ford F150 Forum Community of Ford Truck Fans

How to Repair Ford Seat Belt eHow

Airbag Systems How to Repair Sealtbelt Pre Tensioner

you will have to be patiant with this as long as the seat belt tensioners havent gone try to pull the belt so some tension comes of it so it can roll back into the spool or jiggle it by bulling on it quickley should be a simple fix hope this helps

dont cut the belt try to tighten more to release it or unbolt

For 2001 Ford Truck Windstar 3.8L SFI 6cyl

Fig. Accessory serpentine belt routing-3.8L engine (click for zoom)

Using a 15mm wrench attached to the drive belt tensioner pulley, rotate the tensioner clockwise to release the tension. Remove the drive belt from the pulley. When installing the new drive belt, ensure that the drive belt is routed correctly and note the position of the indicator mark on the tensioner.

Fig. Drive belt tensioner wear indicator marks

Hope helps (remember to rate thsi answer).

Loosen the lock bolt on the upper part of the tensioner(arrowed in black). Release tension on the belt at the tensioner(arrowed in red) by turning counter clockwise on the pulley nut as indicated in blue.
Slip the belt off the pulleys while keeping pressure on the tensioner. Refit the new belt and make sure it is properly located on all the pulleys before releasing pressure on the tensioner. Tighten the lock bolt.
The tensioner is self adjusting you just need to make sure the belt is properly seated on all the pulleys before tightening the lock bolt.
The exact position of the tensioner varies on the different engines but the routing is the same and it is always between the alternator and power steering pulleys on the gas engines.
C - Cranshaft
A - AIR pump
Alt - alternator
W - Water pump
P - Power steering
A/C - airconditioning

use a 15mm box wrench on the nut retaining the tensioner pulley to pry the tensioner 'arm' against the spring to release belt. note belt routing on decal under hood,or make a sketch,to aid in replacement.
on OHV engine rotate clockwise
on OHC rotate counter clockwise
be sure belt is completely seated on pulleys

The latch is stuck in the open position. I always found white lithium grease worked best on those latches but any good lubricant will work. Try moving the latch manually with a screwdriver. After applying the lubricant move the latch a few times. You should see the tension return to the release, if it doesn't you have a broken release cable.

please rate highly if this is what you need

Section 01-10: Seats and Tracks 1994 Mustang. Workshop Manual
REMOVAL AND INSTALLATION Seat Cushion, Rear Removal and Installation

1. Release pin from locks by pressing release button under rear seat cushion.

1. Pull rear safety belt and buckle (60044) through openings in rear seat cushion pad and frame (600A88) and remove rear seat cushion pad and frame .

1. To install, reverse Removal procedure.
   

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Section 01-10: Seats and Tracks 1994 Mustang. Workshop Manual
REMOVAL AND INSTALLATION Seat Back, Rear Sedan
Removal

1. Remove rear seat cushion as outlined.

1. Remove rear seat bolster. Refer to Section 01-05 .

1. Remove rear seat bolster mounting bolts. Remove bolster assembly.
2. Remove four seat back to package tray retaining bolts.

1. Remove seat back.

1. To install, reverse Removal procedure.

sometimes a short quick tug will release them, if not it's probable it needs to be replaced.

un bolt to remove tension, pull some of the belt out and rebolt.