Re: headlight gremlins - Saab 9000 Bulletin Board - Saabnet.com
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Re: headlight gremlins
Posted by Lu [Email] (more from Lu) on Fri, 22 Oct 2004 20:31:28
In Reply to: headlight gremlins, presto 96 9000 CSE 2.3t, Fri, 22 Oct 2004 07:22:25
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Two 'relay' boxes involved. Fuses for headlamps are good test points for test light as they are last thing before wire goes out to the lamp. Tall Control Relay is the culprit hardest to test. 56a and 56b are tabs for high and low beams. Pull off cover and look for any frosty color or hairline crack on the 90° base to board junction solder joints. On wide body relay the heavy relay solder pads on the board can become cracked from vibration and shock of road travel. Resolder but remove old solder first with wick or a sucker. It will contaminate the new flow of clean solder. Wipe solder several times with dry or alcohol'd cheap tissue. Lead oxide on solder contaminates also and will show up as a dark line on the tissue first couple of pull throughs. Test light the fuses to see if juice is there but not at lamp (loose socket on lamp pins) or bad grd contact on lamp socket. Find this by poking sharp pin in wire just out of connecto at lamp. You should only see power on supply side of socket with lamp in connector. If you see power on grd side wire look for bad grd connection.
posted by 12.166.2...
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