CHART 1: With Federal Emissions
The fuel injection computer (known in tech speak as the PCM = Powertrain Control Module) is located behind the right (passenger) side kick panel inside your 2.3L Ford Mustang.
The PCM has a 60 pin connector and on the back side of the connector (wire side) are embossed a few numbers to further aid you in correctly identifying the pins (circuits).
APPLIES TO: The PCM connector pinout applies on to the following vehicles:
- 2.3L Ford Mustang: 1990.
WIRE COLOR LEGEND: You can find the wire color legend here: PCM Connector Pinout Wire Color Legend.
| 60 Pin PCM Connector Pinout | ||
|---|---|---|
| Pin | Wire Color | Description |
| 1 | BLK/ORG | Keep Alive Power (KAPWR) |
| 2 | RED/LT GRN | Brake On-Off (BOO) Switch |
| 3 | YEL/LT GRN | Programmable Speedometer/Odometer Module (PSOM) (+) |
| 4 | DK GRN/YEL | Ignition Diagnostic Monitor (IDM) |
| 5 | -- | Not Used |
| 6 | -- | Not Used |
| 7 | LT GRN/YEL | Engine Coolant Temp (ECT) Sensor |
| 8 | --- | Not Used |
| 9 | --- | Not Used |
| 10 | BLK/YEL | A/C Compressor |
| 11 | --- | Not Used |
| 12 | --- | Not Used |
| 13 | --- | Not Used |
| 14 | --- | Not Used |
| 15 | --- | Not Used |
| 16 | BLK/ORG | Ignition Module Ground |
| 17 | TAN | Self Test Output (STO) - Check Engine Light (CEL) |
| 18 | --- | Not Used |
| 19 | --- | Not Used |
| 20 | BLK | Case Ground |
| 21 | WHT/LT BLU | Idle Speed Control Solenoid |
| 22 | TAN/LT GRN | Fuel Pump Relay Control |
| 23 | YEL/RED | Knock Sensor |
| 24 | LT GRN/PPL | AC Clutch Cycling Press Switch |
| 25 | LT GRN/RED | Air Charge Temp (ACT) Sensor |
| 26 | ORG/WHT | VREF (5 Volt Reference - EGR Position Sensor, TPS, MAP Sensor) |
| 27 | BRN/LT GRN | EGR Valve Position (EVP) Signal |
| 28 | --- | Not Used |
| 29 | DK GRN/PNK | Heated Exhaust Gas Oxygen (HEGO) Sensor |
| 30 | PPL/YEL | Clutch Interlock Switch (MT only) Manual Lever Position Sensor (AT only). |
| 31 | --- | Not Used |
| 32 | --- | Not Used |
| 33 | DK GRN | EGR Control (EVR) Solenoid |
| 34 | --- | Not Used |
| 35 | --- | Not Used |
| 36 | YEL/LT GRN | Spark Output (SPOUT) |
| 37 | RED | Vehicle Power (VPWR) |
| 38 | --- | Not Used |
| 39 | --- | Not Used |
| 40 | BLK/LT GRN | PWR Ground |
| 41 | --- | Not Used |
| 42 | --- | Not Used |
| 43 | --- | Not Used |
| 44 | --- | Not Used |
| 45 | LT GRN/BLK | MAP Signal |
| 46 | BLK/WHT | Signal Return (Sensor Ground) |
| 47 | DK GRN/LT GRN | Throttle Position Sensor (TPS) Signal |
| 48 | WHT/RED | Self Test Input (STI) |
| 49 | ORG | HEGO Ground |
| 50 | --- | Not Used |
| 51 | --- | Not Used |
| 52 | YEL | EGR Control Solenoid |
| 53 | ORG/YEL | Automatic Transmission Solenoid |
| 54 | ORG/LT BLU | AC Cooling Fan Control |
| 55 | --- | Not Used |
| 56 | DK BLU | Profile Ignition Pickup (PIP) |
| 57 | RED | VPWR |
| 58 | TAN/ORG | Injector Bank 1 (Cyl: #1, #4) |
| 59 | TAN/RED | Injector Bank 2 (Cyl: #2, #3) |
| 60 | BLK/LT GRN | Power Ground |
WIRE COLOR LEGEND: You can find the wire color legend here: PCM Connector Pinout Wire Color Legend.
PCM Connector Pinouts: The following PCM connector pinouts are available:
- PCM Connector Pin Out Chart (1991 2.3L Ford Mustang).
- PCM Connector Pin Out Chart (1992-1993 2.3L Ford Mustang).
Safety Precautions
Here are some very important safety precautions when testing the wires coming out of the 60 pin PCM connector.
- If one or any of the wires on your Ford pickup DO NOT match the color stated in the pin out charts, then you should not use the pin out charts in this article. Why? Because this is the clearest indication that these ARE NOT the connector pin out charts for your particular Ford pickup.
- Never probe the front of the connector.
- You should use a wire piercing probe and probe the wire a few inches away from the connector.
- To see what this tool looks like: Wire Piercing Probe.
- You should use a back-probe.
- You should use a wire piercing probe and probe the wire a few inches away from the connector.
- You should never disconnect any of the PCM connectors without first disconnecting the battery negative (-) terminal.
Disclaimer
I've made every effort to double and triple check the above info (and in the next couple of pages) and I've used the best sources to compile it but nothing in life is perfect. I don't have a staff of proof readers or editors, I'm just a little guy typing this stuff up in my spare time to help and give back to the Do-It-Yourself community. So without further ado, here's my disclaimer:
© copyright Abraham Torres-Arredondo: This information is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.