96 97 LT 1/LT 4 OBDII Wiring Harness INSTRUCTIONS & SUPPLEMENTAL INFORMATION

1. Check engine light. (brown wire) You must provide 12 volt bulb and wire that is hot with the key on and in the run position.
2. Tech wire (White)
3. 4 K pulse for speed control (green wire)
4. ALDL Connector. (used to plug in scanning tool)
5. Park Neutral switch (Orange wire, if desired. closed in park neutral to ground)
6. Brake light switch (Purple. Normally closed. Hot all the time the ignition is on except when brake is applied)
7. Fuel Pump Relay (GM part #14078915)
8. Vats bypass
9. Fuse Block
9A. 12 volts crank and run (Red. Must have 12volts in run position and a minimum of 10 volts in crank position)
10. Oil Pressure sending unit (White wire. For use with GM gauge. with sending unit #10201491 ONLY. with after market gauges, you must use their sending unit.)
11. Three prong oil sending unit plug (gray plug with green seal and brown, white and orange wires. Backup system for fuel pump. Turns fuel pump off when pressure drops)
12. Distributor plug (Black plug with tan seal and red, yellow, purple and black wires. Plugs into harness coming from the distributor. The distributor pig tail should be coming from the distributor.
13. Ground wire (black wire. Must have a good clean ground to the back of engine, and battery must ground to the engine or transmission,engine to frame and engine to body.
14. EGR Solenoid (Black plug with gray seal and red & gray wire. Used only in emission vehicles)
15. Passenger side O2 sensor (Black plug with tan seal and brown, purple, black and pink wires.)
16. Passenger side injector plugs
17. Driver side injector plugs
18. Hot wire to fuel pump (single brown wire)
19. Starter battery terminal or to battery disconnect. (Fusible link).
20. Throttle position sensor (Black plug with purple seal and black, gray, blue wires).
21. Idle air motor (Black plug with blue seal and white, red, brown, yellow wires).
22. Charcoal canister purge (Red plug with gray seal, red and white wires).
23. MAP sensor (Green Plug with green seal and gray, green, and black wires)MAP sensor must have vacuum from intake manifold.
24. Air temp sensor (Gray plug with blue seal and red, black wire) With S&P air cleaner, use GM sensor #25036751
25. Driver side O2 sensor (Black plug with tan seal and brown, purple, black and pink wires.)
26. Knock sensor (Gray plug with blue wire. Driver side. Not used on IROC/TA)
27. Knock sensor (Gray plug with blue wire.Passenger side is used on all LT-1)
28. Vehicle speed sensor (Black plug with blue seal and twisted yellow and purple wires). Plugs into transmission tail housing)
29. 4L60E Transmission plug (Big gray plug). Transmission plug).
30. MASS AIR FLOW (Black plug with purple seal and yellow, black, and red wires) Used if desired
31. Engine temp sensor (Black plug with blue seal and yellow and black wires)
32. Crank sensor (Black plug with purple seal and red, yellow and black wires). Hooks to the lower passenger side of timing cover
33. Coil Plug (Beige plug with purple seal and white and red wires)
34. Coil Driver Plug (Black plug with blue seal and red, white, black and green wires)

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