Ground Circuit Checks
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1998 Volvo V90, 1998 Volvo V70, 1998 Volvo S90, 1998 Volvo S70, and 1997 Volvo V90. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Install breakout box and adapter. Connect adapter connector "A" to breakout box. Measure resistance between ground and breakout box terminals No. 13, 28 and 42. Ohmmeter should indicate about zero ohms at all terminals.