An alternator pulley, of the incorrect size, installed at the factory can be the cause of drive belt failure and illumination of the battery light. The alternator pulley should be inspected and replaced as necessary if the drive belt brakes. When the new belt installed, it must be adjusted to the proper tension.
Battery Light Comes On, Belt Failure, Sometimes Repeatedly on Mercury Capri
Average mileage: 126,166 (87,000–169,000)
Engines affected: 1.6L 4 Cylinder, 1.6L 4 Cylinder Turbo
10 people reported this problem
1991 Mercury Capri - 1.6L 4 Cylinder 87,000 mi, Visitor
Alternator belt keeps snapping. Replaced alternator, and belt 3 times. Mechanics have no idea how to fix it.
1991 Mercury Capri - 1.6L 4 Cylinder Turbo 103,000 mi, Visitor
Still in shop
1991 Mercury Capri - 1.6L 4 Cylinder Turbo 121,000 mi, Visitor
Alternator belt broke. Had replaced and drove it 2 days later and it broke again.
1993 Mercury Capri - 1.6L 4 Cylinder 137,000 mi, Visitor
had to make sure tension on belt is real tight.