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Old Oct 31, 2019 | 03:38 PM
  #16  
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FONRDAY
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that does not work on 17

Originally Posted by Sterling6.7
Disconnect the batteries and turn the headlights on for about 10 minutes. This gives it a good drain and forces a reset. I had similar issues about 16 months ago, did this and no problems since.
It wont let you turn headlights if no voltage is detected it has a battery back up to retain info stored in computer
 
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Old Oct 31, 2019 | 09:43 PM
  #17  
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Sterling6.7
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Getting light wasn’t the point. Draining the electronics is. Regardless, it works. There are settings that the PCM(?) battery doesn’t retain and also resets the TCM, because the learned patterns are gone. I’m not up on the proper names, but there are technical names for the levels of computer memory.
 
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Old Oct 31, 2019 | 10:17 PM
  #18  
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FONRDAY
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From: California Mountains
it wont drain if lights wont turn on

Originally Posted by Sterling6.7
Getting light wasn’t the point. Draining the electronics is. Regardless, it works. There are settings that the PCM(?) battery doesn’t retain and also resets the TCM, because the learned patterns are gone. I’m not up on the proper names, but there are technical names for the levels of computer memory.
It wont let your turn lights or etc if no battery are present
 
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