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Discussion Starter #1
Hey everyone!

I posted on this awhile ago and unforunately no one replied or was able to help me on this... I'm sure that someone else out there has a Pioneer deck and has had the pink VSS (Variable Speed Sensor) wire up. I have done lots of research on the matter and am leaning towards connecting it to the wiring harness in the ECM.

I have taken the 3 posts below and tried applying them to my install with no success. Possibly Pontiac is different then Chevy when it comes to this type of wiring.

Please see:

http://www.cobaltss.net/forums/electronics-audio-video-49/vss-wire-103906/

http://m.cobaltss.net/forums/showthread.php?t=170611

http://www.the12volt.com/installbay/forum_posts.asp?TID=88839&TPN=1&PN=1

I have tried tapping into the YELLOW wire in the bottom harness as recommended with no success. see pic below...



In that 3rd harness note there is a second yellow wire in a twisted pair though. see pic below - note my cam flash washed out the yellow color in that twisted pair but it is plain bright unmarked yellow.... I just feel strongly against using it as its the only wiring clearly paired up with another one (purple).



I have also tried connecting to the only yellow wire in the first harness.

The second harness has 3 solid yellow wires... It may be one of them??? Please anyone help me i'm losing my mind hooking up random yellow wires... Im also worried I will fry something if I keep probing...

ANYONE????
 

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#low
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1,537 Posts
I will try and pull up a diagram from my Gm manual for you.
 

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#low
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1,537 Posts
Vehicle Speed Sensor

Pin A, Colour Purple, VSS Low Signal.
Pin B, Colour Yellow, VSS high signal.

Those are the colours at the VSS sensor connector, not the ones at the PCM but i assume they are the same colours.
 

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Discussion Starter #4
Vehicle Speed Sensor

Pin A, Colour Purple, VSS Low Signal.
Pin B, Colour Yellow, VSS high signal.

Those are the colours at the VSS sensor connector, not the ones at the PCM but i assume they are the same colours.


Are you sure? Everyone says they are yellow
 

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#low
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one is yellow the other is purple, high and low signals. This is as per the factory service manual. That is the colours at the connector for the sensor wire. I assume they are the two wires braided together. Just splice the yellow one you should be fine. This is what i have gathered from my wiring diagrams from the service manual.
 
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