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post #1 of 2 (permalink) Old 11-08-2013 Thread Starter
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Join Date: Nov 2013
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Low Beam Lights not working on S40

Purchased a used S40 for my daughter. Low beam lights were not working but high beam lights were. Most of the forums I read lead me to believe that the problem was a defective CEM circuit board. Couldn't afford a new CEM, so I ordered a used one from ebay for $65.00. Installed the board in about 15 minutes (unplugged battery; removed necessary panels beneath steering column; removed screws holding CEM; wiggled the CEM half way out; disconnected the plug ins; reinstalled new CEM) and whooooolaaaaa!!!! I have low beam lights....hopes this helps someone...
bna1dew is offline  
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post #2 of 2 (permalink) Old 02-19-2017
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I seem to be facing a similar problem in my 2007 S40. What year is your S40? I have seen cautions about unhooking the battery and used replacement modules, not sure to which years this may apply. Did you need to sync with the ECM for VIN and key registration? Does the same module work for halogen or Bi-Xenon headlamps and also support fog lights? I have halogen headlamps lamps and also have fog lights.


bob-in-va is offline  
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