Switched Cigarette Lighter Socket - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 01-19-2009, 05:25 PM
sharpy sharpy is offline
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2004 Chevy TrailBlazer LT
Bordeaux Red Metallic 4.2L I6 4X4
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Location: Crystal Lake, IL
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Switched Cigarette Lighter Socket

Re : 2004 4.2 Trailblazer

Does anybody know the easiest way to mod the lighter socket(s) in the front so that they are switched by the ignition key ? My bluetooth carphone stays connected when I'm in the house unless I remember to unplug it from the lighter socket.
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  #2  
Old 01-19-2009, 05:45 PM
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filthyfingers filthyfingers is offline
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2002 GMC Envoy SLE
Summit White 4.2L I6 4X4
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Great idea... especially if you can convert just 1 of the receptacles. I've faced a dead battery all too often because I forgot to shut off the satillitte radio or the gps.
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Old 01-19-2009, 07:39 PM
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the roadie the roadie is offline
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2004 GMC Envoy SLT "Roadiemobile"
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If you don't need a lot of power for a real cigarette lighter, just cut off the orange (color code for BATT constant power along with RED) wire on the back of the receptacle and connect it instead to a PINK wire (the color code for ACCY/RUN/START switched power). You should be able to find PINK at the brake light switch near the pedal or going to the turn signal switch. Or use WHITE or ORANGE coming out of the ignition switch harness.

Or if you want RUN only, that's a brown wire that goes places like the HVAC control module.

You could also use one of those add-a-fuse gadgets to re-power Fuse 13 under the hood that feeds the receptacle, but since it also powers the Data Link connector used to read codes, you may not want to do that. If you don't care about the data link power, let me know and I can trace a signal that will do that. Have you seen or used those add-a-fuse gadgets? Do you have a meter to check for accessory power before tapping into things?



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  #4  
Old 01-19-2009, 08:23 PM
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oregtrailblaz oregtrailblaz is offline
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2004 Chevy TrailBlazer LT
Blueish, with silver trim 4.2L I6 4X4
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Hey Roadie, how about a relay on the orange wire switched by the pink wire...?? That way you still have the supply from the original power source without too much extra load on the pink wire... But I'm definately no electrical engineer!! But thats what I was thinking about on mine!!
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Old 01-20-2009, 01:46 PM
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the roadie the roadie is offline
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A relay would work fine. You could even put in a switch to select switched or constant power to the receptacle for different needs.



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