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Lamp failure light gives false signal 200 1985

posted by  B.C. on  Sun Nov 11 18:12 CST 2007
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last visit: Wed Mar 28 22:28 CST 2012
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The Bulb Failure Warning System relay (BFWS) works by comparing magnetic field created by a light on the right side with that created by the same light on the left side. "Tested" pairs are brake lights, rear marker lights, low beam headlights. (The 3rd brake light is in the testing somehow.)

A very small difference on one side as compared to the other will cause the BFWS relay to light the warning light. If a bulb has a small bit of oxide on the tip or on a ground connection, there will be an imbalance. The light will come on, and if the current burns through the oxide, it will quickly go off.

I have seen this on several of my 240s. Check all the connections and grounds on each tail light.

Good Luck,

Bob

:>)






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New Lamp failure light gives false signal [200][1985]
posted by  Stickbuilder subscriber  on Sun Nov 11 01:28 CST 2007 >


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