Turn signal circuit wiring diagram - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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  #1  
Old 11-08-2010, 08:48 PM
SparkyJJO SparkyJJO is offline
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2002 Chevy TrailBlazer LS
Forest Green Metallic 4.2L I6 4X4
Join Date: Feb 2010
Location: Columbus, Ohio
Posts: 1,433
Turn signal circuit wiring diagram

Does anyone have the wiring diagram for the turn signal circuits? I have a few ideas and I need this info to see if it will work, but I can't seem to find it anywhere online

Doesn't help that there is something wrong with my internet connection and google will not load
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  #2  
Old 11-08-2010, 10:13 PM
DJones DJones is offline
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2003 Chevy TrailBlazer LTZ
Summit White 4.2L I6 4X4
Join Date: Oct 2009
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What are your ideas?

Do you have a Haynes manual? They explain it well.

Here is wiring for the signal module under the steering wheel:

Big Black: ground
Big Orange: +12
Big White: +12 when braking
White: Hazard switch (GND on)
Lt. Green: Right Turn Switch (+12 on)
Dk. Green: Left Turn Switch (+12 on)
Dk. Green: Right trailer lights
Yellow: Left trailer lights
Yellow: Left turn lights
Tan: Right turn lights

It is configured that the trailer lights will turn on when braking, but is overriden to blink with the turn signal, or something like that. I am building a custom one myself, which will not make any clicking noise when blinking.
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  #3  
Old 11-08-2010, 10:19 PM
SparkyJJO SparkyJJO is offline
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2002 Chevy TrailBlazer LS
Forest Green Metallic 4.2L I6 4X4
Join Date: Feb 2010
Location: Columbus, Ohio
Posts: 1,433
Ideas are a secret, at the moment

No I don't have a Haynes yet. Thanks for the color codes.. but I need the actual diagram too

*edit* actually the more I look at it, the more I think that may be enough. Back to Multisim to experiment

*edit2* OK my experiment worked! Only concern I have is there are multiple wires with the same color listed. Two dark green and two yellow.
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