Checking for an open-circuit
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Check the cable between DSA control module terminal 7 and one of the stop (brake) lamps for an open-circuit according to Open-circuit, permanent faults .
Check the central electrical module (CEM) connector for contact resistance and oxidation according to Contact resistance and oxidation .
If the cable is OK, check the stop (brake) lamp bulbs and the stop (brake) lamp ground terminal for an open-circuit according to Open-circuit, permanent faults .
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Refer to Verification