Check the position of the cable

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Core Crimp And Insulation Wings

Courtesy of VOLVO CARS OF NORTH AMERICA.

This is how a cable should be located in the terminal:

The stripped core should be under the core wings (1). It must not stick out too far in front or behind the core wings.
The cable insulation should only be under the insulation wings (2). It must not lie too far out in front of or lie too far in under the insulation wings.

Check the cable is firmly inserted by carefully holding the cable terminal and pulling on the cable.