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Can anyone ID these connectors - LS2 Engine Harness

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Old 08-16-2014, 02:19 PM
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Default Can anyone ID these connectors - LS2 Engine Harness

Actually, if anyone has a diagram where I could look up what each of the connectors in an LS2 (2007 TBSS) engine harness, that'd be awesome as well!

Sorry if it's hard to make out in the pictures, but any help would be awesome!

Click to enlarge pictures:



1. TCM connector?
2.
3. Injectors
4.
5.
6.
7.
8.
9.
10.
11. Foward O2 sensors.
12. Injectors
13.
14.




15. Rear o2 sensor
16. Rear o2 sensor
17.
18. Reverse light switch?
19. Automatic transmission round connector?
20.
21.
22.
23.
24.
25.


Thanks.

-Don
Old 08-16-2014, 04:06 PM
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I am very confused. You have 3 plugs already plugged into the computer, and the blue one you have marked as #1 is supposed to plug into that. It's the other end of the pedal part of the harness. I have no idea what you have plugged in there now.

I think 14 is the one that plugs into the gas pedal.

As for the rest, I'm not really sure.
Old 08-16-2014, 04:31 PM
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Originally Posted by superdave84
I am very confused. You have 3 plugs already plugged into the computer, and the blue one you have marked as #1 is supposed to plug into that. It's the other end of the pedal part of the harness. I have no idea what you have plugged in there now.

I think 14 is the one that plugs into the gas pedal.

As for the rest, I'm not really sure.
I am pretty sure that first connector is for the TCM for an automatic transmission (which I am not using).

-Don
Old 08-16-2014, 04:32 PM
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These connectors if anything confuse me the most.

-Don
Attached Thumbnails Can anyone ID these connectors - LS2 Engine Harness-unnamed-1-.jpg   Can anyone ID these connectors - LS2 Engine Harness-unnamed-2-.jpg  
Old 08-16-2014, 11:28 PM
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17 = park, nuet switch
25= knock
13= coil
14= t/b
7 =map or crank depending on wire colors
Take better picts

Last edited by EFIHARNESS; 08-16-2014 at 11:37 PM.
Old 08-17-2014, 03:42 AM
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Originally Posted by superdave84
I am very confused. You have 3 plugs already plugged into the computer, and the blue one you have marked as #1 is supposed to plug into that. It's the other end of the pedal part of the harness. I have no idea what you have plugged in there now.

I think 14 is the one that plugs into the gas pedal.

As for the rest, I'm not really sure.
I'm nearly certain the 2007 LS2 in the TBSS utilizes the E67 PCM and 58x reluctor, which is a different animal from our GTO LS2's with the E40 PCM and 24x reluctor.

Tipsy

EDIT: If you don't already have it, this should be the pinouts for the 2007 TBSS E67.

Last edited by TipsyMcStagger; 08-17-2014 at 04:17 AM.
Old 08-17-2014, 12:46 PM
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I was able to find a scan from a book that showed what most of the connectors were and I matched them up with the wire colors in the wiring diagram above (Thanks Tipsy!).

However, there are these last three that I still haven't been able to figure out what they are for.
Attached Thumbnails Can anyone ID these connectors - LS2 Engine Harness-unnamed.jpg   Can anyone ID these connectors - LS2 Engine Harness-unnamed-2.jpg   Can anyone ID these connectors - LS2 Engine Harness-unnamed-2-.jpg  
Old 08-18-2014, 08:05 AM
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2 pin black and orange connector is for the Alternator.
2 pin grey and blue connector is for the A/C compressor
The last one is a body connector. It would have plugged in to the body wiring on the Trailblazer for communications with the dash, BCM, etc. Probably a few power wires in there also.
Old 08-18-2014, 12:15 PM
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Originally Posted by Jones'n
2 pin black and orange connector is for the Alternator.
2 pin grey and blue connector is for the A/C compressor
The last one is a body connector. It would have plugged in to the body wiring on the Trailblazer for communications with the dash, BCM, etc. Probably a few power wires in there also.
Awesome! Much appreciated. That solves all of my connectors!



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