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Trunk opener circuit

 
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Walter2
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2003 Chevrolet Impala


PostPosted: Thu Jul 28, 2011 2:53 am    Post subject:  Trunk opener circuit Reply with quote

I replaced a shorted trunk release solenoid. The trunk opener now works but I have a concern with that electrical circuit. The power wire to the push button for the trunk opener is 1/2 volt less than the battery voltage. With the engine running it equals the alternator output voltage. I would like to fix the cause of this slight voltage drop as I feel this may get progressively worse over time. Does anyone have a schematic for this circuit. Thanks in advance for any help you may offer.
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bbengineer
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2004 Chevrolet Impala
1998 Chevrolet Corvette
2007 Chevrolet Tahoe
2008 Subaru Impreza
1970 Chevrolet Chevelle


PostPosted: Thu Jul 28, 2011 7:41 am    Post subject:   Reply with quote

The button is ground switched, so the voltage you are seeing is backfeed from the weak pullup inside the BCM

A lower voltage is normal and there is nothing to fix

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