mas28O Posted September 21, 2004 Share Posted September 21, 2004 I wanted to post this for people that want to do there own wiring on the LS1. Wiring the LS1 is the same as the lt1. Just make sure that you have power & ground at all of the pins that need it. Also pull out all of the relay wires, fuel, fan #1, fan # 2. I programmed my ecu to get rid of all of the codes and Vats. Here is the pinout from Ls2.com http://www.ls2.com/boggs/torques/00pinpcm.htm Connector Part Information PCM Connector C1 Assembly 12191489 TPA (BLU) 12176408 Connector Cover 12191108 Blue Pin Wire Color Circuit No. Function 1 BLK 451 PCM Ground 2 LT GRN 1867 Crankshaft Position Sensor B+ Supply 3 PNK/BLK 1746 Injector 3 Control 4 LT GRN/BLK 1745 Injector 2 Control 5-7 -- -- Not Used 8 GRA 596 TP Sensor 5V Reference 9-10 -- -- Not Used 11 LT BLU 1876 Knock Sensor Signal Rear 12 DK BLU/WHT 1869 Crankshaft Position Sensor Signal 13-16 -- -- Not Used 17 DK BLU 1225 Transmission Range Signal B 18 RED 1226 Transmission Range Signal C 19 PNK 439 Ignition Positive Voltage 20 ORN 340 Battery Positive Voltage 21 YEL/BLK 1868 Crankshaft Position Sensor Reference Low 22 -- -- Not Used 23 GRA 720 Fuel Tank Pressure Sensor/Fuel Tank Sender Ground 24 -- -- Not Used 25 TAN 1671 HO2S Signal Low Bank 2 Sensor 2 26 TAN 1667 HO2S Signal Low Bank 2 Sensor 1 27 -- -- Not Used 28 TAN/WHT 1669 HO2S Signal Low Bank 1 Sensor 2 29 TAN/WHT 1653 HO2S Signal Low Bank 1 Sensor 1 30-31 -- -- Not Used 32 GRY 48 Clutch Pedal Position Switch Signal 33 PPL 420 TCC Brake Switch 34 ORN/BLK 434 PNP Switch Signal 35 -- -- Not Used 36 BLK 1744 Injector 1 Control 37 YEL/BLK 846 Injector 6 Control 38-39 -- -- Not Used 40 BLK 451 PCM Ground 41 BLK 407 EGR Pintle Position Sensor Ground 42 DK GRN 335 Engine Cooling Fan Relay 1 Control 43 RED/BLK 877 Injector 7 Control 44 LT BLU/BLK 844 Injector 4 Control 45 GRA 474 A/C Refrigerant Pressure Sensor 5V Reference 46 GRA 474 Fuel Tank Pressure Sensor 5V Reference 47 GRA 416 EGR Pintle Position Sensor 5V Reference 48 GRA 416 MAP Sensor 5V Reference 49-50 -- -- Not Used 51 DK BLU 496 Knock Sensor Signal Front 52 -- -- Not Used 53 BLK 407 Transmission Temperature Sensor Ground 54 ORN/BLK 407 MAP Sensor Ground 55 BRN 1456 EGR Pintle Position Sensor Signal 56 -- -- Not Used 57 ORN 340 Battery Positive Voltage 58 DK GRN 1049 Serial Data 59 -- -- Not Used 60 BLK 452 TP Sensor Ground 61 PNK/BLK 632 Camshaft Position Sensor Reference Low 62-64 -- -- Not Used 65 PPL 1670 HO2S Signal High Bank 2 Sensor 2 66 PPL 1666 HO2S Signal High Bank 2 Sensor 1 67 -- -- Not Used 68 PPL/WHT 1668 HO2S Signal High Bank 1 Sensor 2 69 PPL/WHT 1665 HO2S Signal High Bank 1 Sensor 1 70 BRN 1174 Low Oil Level Switch 71-72 -- -- Not Used 73 BRN/WHT 633 Camshaft Position (CMP) Sensor Signal 74 YEL 410 Engine Coolant Temperature (ECT) Sensor Signal 75 -- -- Not Used 76 BLK/WHT 845 Injector 5 Control 77 DK BLU/WHT 878 Injector 8 Control 78 -- -- Not Used 79 GRA or WHT 587 or 687 Skip Shift Solenoid Control (M/T) or 3-2 Shift Solenoid Control (A/T) 80 BLK 407 Engine Coolant Temperature (ECT) Sensor Ground PCM Connector C2 (RED Connector Part Information PCM Connector C2 Assembly 12191488 TPA (RED) 12176410 Connector Cover 12191108 Pin Wire Color Circuit No. Function 1 BLK 451 PCM Ground 2 BRN 418 TCC Control Solenoid 3 -- -- Not Used 4 PPL 421 AIR Solenoid Relay Control 5 -- -- Not Used 6 RED/BLK 1228 Transmission Fluid Pressure Control Solenoid High 7 RED 1676 EGR Control 8 LT BLU/WHT 1229 Transmission Fluid Pressure Control Solenoid Low 9 DK GRN/WHT 465 Fuel Pump Relay Control 10 WHT 121 Engine Speed (Tach) Output Signal 11-12 -- -- Not Used 13 WHT 85 Cruise Control Enable Signal 14 RED/BLK 380 A/C Refrigerant Pressure Sensor Signal 15 RED 225 Alternator L Terminal 16 -- -- Not Used 17 DK GRN/WHT 762 A/C Request Signal 18 DK GRN 59 A/C Status Signal 19 -- -- Not Used 20 LT GRN/BLK 822 Vehicle Speed Sensor (VSS) Reference Low 21 PPL/WHT 821 Vehicle Speed Sensor (VSS) Signal 22-23 -- -- Not Used 24 DK BLU 417 TP Sensor Signal 25 TAN 472 IAT Sensor Signal 26 PPL 2121 Ignition Control 1 27 RED 2127 Ignition Control 7 28 LT BLU/WHT 2126 Ignition Control 6 29 DK GRN/WHT 2124 Ignition Control 4 30 DK BLU 229 VTD Fuel Enable Signal 31 YEL 492 MAF Sensor Signal 32 LT GRN 432 MAP Sensor Signal 33 DK BLU 473 Engine Cooling Fan Relay 2 and 3 Control 34 DK GRN/WHT 428 EVAP Canister Purge Valve Control 35 -- -- Not Used 36 BRN 436 AIR Pump Relay Control 37 DK GRN 83 Cruise Control Inhibit 38 -- -- Not Used 39 RED 631 Camshaft Position Sensor B+ Supply 40 BLK 451 PCM Ground 41 GRA 435 EGR Position Sensor Ground 42 TAN/BLK 422 TCC Enable Circuit 43 DK GRN/WHT 459 A/C Clutch Relay Control 44 LT GRN 1652 Reverse Inhibit Solenoid Control 45 WHT 1310 EVAP Canister Vent Valve Control 46 BRN/WHT 419 Malfunction Indicator Lamp (MIL) Control 47 YEL/BLK 1223 Transmission Shift Solenoid B 48 LT GRN 1222 Transmission Shift Solenoid A 49 -- -- Not Used 50 DK GRN/WHT 817 Vehicle Speed Output Circuit 51 YEL/BLK 1227 Transmission Temperature Sensor Signal 52 -- -- Not Used 53 GRA/BLK 1687 Spark Retard Signal 54 PPL 1589 Fuel Level Sensor Signal 55-56 -- -- Not Used 57 PPL 719 IAT Sensor Ground 58-59 -- -- Not Used 60 BRN 2129 Ignition Control Reference Low Bank 1 61 BRN/WHT 2130 Ignition Control Reference Low Bank 2 62 -- -- Not Used 63 PNK 1224 Transmission Range Signal A 64 DK GRN 890 Fuel Tank Pressure Sensor Signal 65 -- -- Not Used 66 PPL/WHT 2128 Ignition Control 8 67 RED/WHT 2122 Ignition Control 2 68 DK GRN 2125 Ignition Control 5 69 LT BLU 2123 Ignition Control 3 70-75 -- -- Not Used 76 LT GRN/WHT 1749 IAC Coil B High 77 LT GRN/BLK 444 IAC Coil B Low 78 LT BLU/BLK 1748 IAC Coil A Low 79 LT BLU/WHT 1747 IAC Coil A High 80 -- -- Not Used Quote Link to comment Share on other sites More sharing options...
qwik240z Posted September 21, 2004 Share Posted September 21, 2004 After seeing all that, I am glad I decided to get a speartech harness. I know it was $750 vs. free to $150 for a stock harness but I am not the best at wiring and I didn't want the computer in the engine bay either. It also gives me the diagnostic port for reading codes, reprogramming, etc. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted September 21, 2004 Share Posted September 21, 2004 Good info, Mike......Sticky'd!! Quote Link to comment Share on other sites More sharing options...
Guest 73LT1Z Posted February 25, 2007 Share Posted February 25, 2007 As a footnote, the 1997 (Vette) and 1998 (Vette and F-body) PCMs are wired differently than the 1999 up ones, the pinout is here: http://www.ls2.com/boggs/torques/98pinpcm.htm Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted February 26, 2007 Share Posted February 26, 2007 I have wiring diagrams and pin layouts for all GM cars up to 2006. I have not seen the GTO harness yet so I can't speak for it but if you are working with the Fbody harness it's very simple. If you have cash to throw around then go with Spear Tech. If not send me an email and I will help you. You shouldn't have to worry about the PCM pin out if you are doing your harness. You should be worry about the 5 small connectors that came out of the Fbody EFI harness. I have detail information about these connectors on my web page. Yes when I first look at the PCM harness I freak out too. But when I see the EFI harness it was a piece of cake. So save your money. Now if you have a C5 harness that's a whole different story. If you are doing a swap using the 97-98 C5 PCM and you got it running properly please let me know. V. Quote Link to comment Share on other sites More sharing options...
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