Solenoid Test
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1998 Volvo V90, 1998 Volvo S90, 1998 Volvo S70, 1998 Volvo C70, and 1997 Volvo V90. However, it is still accessible from the selected car via links, so may be relevant.
With starter on bench, connect negative battery lead to starter solenoid terminal "M". Connect positive battery lead to solenoid terminal No. 50. See Fig 1. If plunger does not extend firmly, replace solenoid.