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Old 04-10-2001, 09:20 PM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The SRS control unit sends a voltage signal to the seat belt buckles, since there are different resistance values buckled vs unbuckled a return voltage for one or the other value is *expected* in return. If the ECU sees a different voltage than expected the light stays on for 60-90 seconds. All it takes to damage a buckle is a drop of coffee or other substance. Sometimes the resistor just goes bad!

ON the 1984 thru 1987 the light(test time) is supposed to stay on for 10 seconds. 1988 & later the test period is only 4 seconds.
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