does anybody have a pinout diagram of the computer port ( the port where the plug coming out of the firewall plugs into)? I need to know what wires are where on it. This is a 94 LT-1 with a 6 speed manual trans. Thanks-Joe

 

I'll look it up when I get home tonight. Your talking about the rectangle plug with like less than 12 or so wires , correct?

 

http://shbox.com/1/1995_Z28_engine_harness_A4.jpg

The one I need is where it says PCM. Except i need the computer side of it. If you could help i would greatly appreciate it. This is going into an S-10 so this will greatly help with wiring!! Thanks-Joe

 

http://shbox.com/1/4th_gen_tech2.html#1995_pcm_wiring

or

A is RED PCM connector.
B is BLACK PCM connector.
C is GREY/CLEAR PCM connector.
D is BLUE PCM connector.

Pinout Color Where it goes:

A2 blk/wht PCM Ground
A3 blk Injector #1 Control
A4 lt blu/blk Injector #4 Control
A5 yel/blk Injector #6 Control
A6 red/blk Injector #7 Control
A7 dk grn/wht Fuel Pump Relay Control
A9 gry EGR Vacuum Control Signal Solenoid Valve Ctrl
A10 dk blu Secondary Cooling Fan Relay Control
A11 dk grn Cooling Fan Relay Control
A12 tan/blk Electronic Brake & Traction Control Module
A13 wht TACH Output
A14 brn Air Pump Relay Control
A15 dk blu Performance Mode Indicator Lamp Control
A18 tan/wht PCM Ground
A19 lt grn/blk Injector #2 Control
A20 blk/wht Injector #5 Control
A21 pnk/blk Injector #3 Control
A22 dk blu/wht Injector #8 Control
A23 orn/blk Electronic Brake & Traction Control Module
A25 dk blu Fuel Enable Signal(Theft Detterant System)
A31 ppl VSS Ground
A32 yel VSS Signal
B1 dk grn/wht A/C Request Signal
B2 red/blk Low Resolution Signal
B3 pnk/blk Distributor Reference Low Signal
B5 wht Ignition Control
B6 blk A/C Evaporative Temperature Sensor
B6 blk A/C Refrigerant Pressure Sensor
B6 blk TPS Ground
B6 blk Trans Fluid Temperature Sensor
B7 lt grn 1-2 Shift Solenoid Control
B8 dk grn/wht VSS Output
B12 yel/blk 2-3 Shift Solenoid Control
B13 gry Skip Shift Solenoid Control
B13 wht Control Solenoid
B14 red Distributor Ignition Feed
B15 orn PCM Battery
B16 blk MAP Ground
B19 yel MAF Sensor Signal
B20 ppl/wht OR lt blu/blk High Resolution Signal
B21 dk grn A/C Clutch Status
B28 gry 5v TPS Reference
B28 gry A/C Refrigerant Pressure Sensor
B29 gry MAP 5v Reference
B30 pnk PCM Ignition Feed
B31 orn PCM Battery
C1 lt blu/wht IAC Coil
C2 lt blu/blk IAC Coil
C5 lt grn/blk IAC Coil
C6 lt grn/wht IAC Coil
C7 tan rt o2 Sensor h02s LOW
C8 ppl rt o2 Sensor ho2s HIGH
C11 lt blu Electronic Brake & Traction Control Module
C13 lt blu Performance Mode Switch Signal
C14 lt blu/blk Brake Signal
C15 orn/blk Park Nuetral Position Sensor(4L60E ONLY)
C16 red/blk Pressure Control Solenoid
C19 tan/wht lt o2 Sensor ho2s LOW
C20 ppl/wht lt o2 Sensor ho2s HIGH
C21 tan IAT Sensor Signal
C22 dk blu TPS Sensor Signal
C23 lt grn Map Sensor Signal
C25 yel ECT Sensor Signal
C28 pnk Trans Fluid Temperature Sensor
C29 dk blu Trans Fluid Temperature Sensor
C30 red Trans Fluid Temperature Sensor
C32 blk/wht PCM Ground
D1 tan/wht PCM Ground
D2 lt blu/wht Pressure Control Solenoid
D6 brn Torque Convertor Clutch Solenoid
D6 lt grn Reverse Inhibit Solenoid Control
D8 dk grn/wht A/C Clutch Relay Control
D9 brn/wht Malfunction Indicator Lamp
D10 dk grn/wht EVAP Canister Purge Solenoid Valve Control
D11 tan/blk Torque Convertor Clutch Solenoid
D12 red A/C Refrigerant Pressure Signal
D12 red/blk A/C Refrigerant Pressure Sensor
D15 wht Skip Shift Lamp Control(T56/T5 ONLY)
D20 wht/blk Output Field Service Enable.
D22 dk blu Knock Sensor Signal
D24 dk blu A/C Evaporative Temperature Sensor
D24 dk blu A/C Evaporative Temperature Sensor Signal
D28 yel/blk Trans Fluid Temperature Sensor
D30 pnk PCM Ignition Feed
D30 tan Serial Data