Ground Circuit Check
WARNING: This page is about a different car, the 1994 Volvo 960, 1994 Volvo 940, and 1994 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.
Connect ohmmeter between ground and measuring unit terminal No. 20, then between ground and terminalNo. 29. In both cases, ohmmeter should indicate about zero ohms. Connect ohmmeter between measuring unit terminals No. 20 and 2, then between terminals No. 20 and 15. In both cases, ohmmeter should indicate about zero ohms.