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Test 5: Driver"S Seat Belt Buckle Switch

WARNING: This page is about a different car, the 2004 Porsche Boxster and 2004 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
  1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS  . Ensure driver"s seat belt is unbuckled. Disconnect driver"s seat belt buckle 8-pin connector located under driver"s seat. Measure resistance between 8-pin connector, terminals B7 (Brown/White wire) and B8 (Brown wire). Resistance should be about 400 ohms. Measure resistance between ground and 8-pin connector, terminal B7 (Brown/White wire). Resistance should be infinite.
  2. Insert seat belt tongue into buckle. Measure resistance between 8-pin connector, terminals B7 (Brown/White wire) and B8 (Brown wire). Resistance should be about 100 ohms. If all resistances are as specified, check wiring harness for pinching, chafing or other damage. Repair wiring as necessary. If wiring is okay, replace seat belt buckle switch.
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