Lamp relay can cause bogus bulb failure warnings - Saab 9-5 Bulletin Board - Saabnet.com
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Lamp relay can cause bogus bulb failure warnings
Posted by Douglas (more from Douglas) on Tue, 2 Oct 2007 12:37:44
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Just thought I'd warn other that a failing lamp control relay can cause bogus bulb failure warnings to be displayed on the SID. This is the orange relay in the relay box under the hood. I was getting random bulb failure messages for the head and tail lights over the last few months. Eventually my brights started not working right, and I knew that was caused by the lamp relay. After repairing the relay, not only do the brights now work again, but the bulb failure warnings also seem to have stopped.
This relay is a common trouble spot. Mine was replaced once under warranty, and the replacement failed in exactly the same way. Simply opening the relay and re-flowing the solder joints along the base was the fix.
posted by 216.110.22...
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