I've started to take off some of the wiring that I will not need but need help on some of the pins I came across. I'm listing the wires that I was not to sure of and would appreciated it if someone can help me and tell me which ones I need to keep and which ones I can take off. I'm running an LS1/T56 with a 3rd gen gas tank. The wires that are in question are:

C1 (red connector)
Pins
25- Tan - Intake air temp sensor signal
34- Darkgreen/white - Evap purge value purge
44- lightgreen - Rev inhibit solenoid driver
45- white - Evap vent solenoid driver
50- Darkgreen/white - Vehicle speed output circuit
57- purple - intake air temp sensor ground
64- Fuel tank pressure sensor signal

C2 (blue connector)
Pins
23- Gray - Fuel tank pressure sender/fuel tank sender ground
25- Tan - heated 02 Signal low sen 2 Bank 2
26- Tan - Heated 02 signal low sen 1 bank 2
28- Tan/white - Heated 02 signal low sen 2 bank 1
29- Tan/white - Heated 02 signal low sen 2 bank 1
34- orange/black - PNP switch signal
46- gray - Fuel tank pressure sensor 5V Ref
65- Purple - Heated 02 sensor high bank 2 sensor 2
66- Purple - Heated 02 sensor high bank 2 sensor 1
68- Purple/white - Heated 02 sensor high bank 1 sen 2
69- Purple/white - Heated 02 sensor high bank 1 sen 1

 

I'll try and help but I'm going on memory here so double check me on this.

Red C1:

-Pin 25 and 57 you definitely need. They go to the IAT sensor that sits in the air intake just before the MAF.

-Pin 50 is for your speedometer

-Pins 34, 45 and 64 are emissions related and not mandatory for running

-Pin 44 I have no idea


C2 blue;

- Pins 25, 26, 28, 29, 65, 66, 68, 69 These are for your O2 sensors. I will assume you know this already but the LS1's use four of them. You need two and can delete two. Cant say which pins going off memory here but the front two are required and the rear two ( after cats ) are for emission purposes not for engine management. If these are the pins for the rear O2's then you can delete them.

- Pin 23 again is for emissions/evap not req'd to run.

- Pin 34 no idea


Hope this is of some help.

 

Ok I cleaned up the wiring harness a little more but does any one know what C1 connector pin 44 is and what c2 connector pin 34 is?

 

34 is neutral safety switch