Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1993 Ford Probe Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Anti-Theft Systems: Testing: Notes
Use the following diagnosis chart to determine individual pinpoint tests for anti- theft system.
ANTI-THEFT MODULE CONNECTOR CIRCUITS
| Pin No. | Circuit (Color) | Function |
|---|---|---|
| 1 | 23 (T/LG) | Battery Power |
| 2 | 13 (R/BK) | Low Beam Headlights |
| 3 | 701 (LB/BK) | Door Ajar Input |
| 4 | 296 (W/P) | Hot In ACC/RUN |
| 5 | 26 (W/P) | Deck Lid Input |
| 6 | 25 (DG/P) | Disarm Switch Input |
| 7 | 118 (PK/O) | Unlock Passenger Door |
| 8 | 163 (R/O) | Unlock Driver Door |
| 9 | 117 (PK/BK) | Lock All Doors |
| 10 | ***** | Not Used |
| 11 | ***** | Not Used |
| 12 | 32 (R/LB) | Starter Interrupt Input |
| 13 | 33 (W/PK) | Starter Interrupt Output |
| 14 | ***** | Not Used |
| 15 | 343 (DB/LG) | Alarm Indicator Light |
| 16 | 23 (T/LG) | Battery Power |
| 17 | 13 (R/BK) | Low Beam Headlights |
| 18 | 6 (Y/LG) | Horn Enable Output |
| 19 | ***** | Not Used |
| 20 | ***** | Not Used |
| 21 | 14 (BR) | Parking Lights |
| 22 | ***** | Not Used |
| 23 | ***** | Not Used |
| 24 | 33 (W/PK) | Starter Interrupt Output |
| 25 | 627 (BK/O) | Door Ajar Output |
| 26 | 57 (BK) | Ground |
ANTI-THEFT MODULE CONNECTOR CIRCUITS
| Pin No. | Circuit (Color) | Function |
|---|---|---|
| 1 | 195 (T/W) | Battery Power |
| 2 | ***** | Not Used |
| 3 | 627 (BK/O) | Door Ajar Input |
| 4 | 640 (R/Y) | Hot In ACC/RUN |
| 5 | 23 (T/LG) | Trunk/Hood Tamper Switch |
| 6 | 25 (T/LG) | Door Disarm Switches |
| 7 | 118 (PK/O) | Unlock Passenger Door |
| 8 | 163 (R/O) | Unlock Driver Door |
| 9 | 117 (PK/BK) | Lock All Doors |
| 10 | 936 (DG/W) | Ignition Tamper Input |
| 11 | 342 (LG/P) | Starter Interrupt Output |
| 12 | ***** | Not Used |
| 13 | ***** | Not Used |
| 14 | ***** | Not Used |
| 15 | 343 (DB/LG) | Alarm Indicator Light |
| 16 | 195 (T/W) | Battery Power |
| 17 | ***** | Not Used |
| 18 | 1 (DB) | Horn Relay |
| 19 | ***** | Not Used |
| 20 | ***** | Not Used |
| 21 | 218 (W/P) | Flash Lights Output |
| 22 | ***** | Not Used |
| 23 | 57 (BK) | Ground |
| 24 | ***** | Not Used |
| 25 | 267 (BK/O) | Door Ajar Output |
| 26 | 57 (BK) | Module Ground |
ANTI-THEFT MODULE CONNECTOR CIRCUITS
| Pin No. | Circuit (Color) | Function |
|---|---|---|
| 1 | 23 (T/LG) | Battery Power |
| 2 | 13 (R/BK) | Low Beam Headlight Output |
| 3 | 341 (O/W) | Door Ajar Input |
| 4 | 296 (W/P) | Hot In ACC/RUN |
| 5 | 486 (BR/W) | Trunk Tamper Switch |
| 6 | 25 (DG/P) | Door Disarm Switches |
| 7 | 118 (PK/O) | Unlock All Doors |
| 8 | 163 (R/O) | Unlock Driver Door |
| 9 | 117 (PK/BK) | Lock All Doors |
| 10 | ***** | Not Used |
| 11 | ***** | Not Used |
| 12 | 33 (W/PK) | Starter Interrupt Input |
| 13 | 32 (R/LB) | Starter Interrupt Output |
| 14 | ***** | Not Used |
| 15 | 343 (DB/LG) | Alarm Indicator Light |
| 16 | 23 (T/LG) | Battery Power |
| 17 | 13 (R/BK) | Low Beam Headlight Output |
| 18 | 6 (Y/LG) | Horn Relay Output |
| 19 | ***** | Not Used |
| 20 | ***** | Not Used |
| 21 | 14 (BR) | Parking Lights |
| 22 | 14 (BR) | Parking Lights |
| 23 | ***** | Not Used |
| 24 | 32 (R/LB) | Starter Interrupt Output |
| 25 | 267 (BK/O) | Door Ajar Output |
| 26 | 57 (BK) | Ground |
ANTI-THEFT MODULE CONNECTOR CIRCUITS (MARK VIII)
| Pin No. | Circuit (Color) | Function |
|---|---|---|
| 1 | 931 (T/LG) | Battery Power |
| 2 | ***** | Not Used |
| 3 | 627 (BK/O) | Door Ajar Switches |
| 4 | 294 (W/LB) | Ignition Switch Input |
| 5 | 26 (W/P) | Trunk/Hood Tamper Switches |
| 6 | 25 (DG/P) | Door Disarm Switches |
| 7 | 118 (PK/O) | Unlock All Doors |
| 8 | 163 (R/O) | Unlock Driver Door |
| 9 | 117 (PK/BK) | Lock All Doors |
| 10 | 936 (DG/W) | Ignition Key Sensor |
| 11 | 342 (LG/P) | Starter Interrupt |
| 12 | ***** | Not Used |
| 13 | ***** | Not Used |
| 14 | ***** | Not Used |
| 15 | 343 (DB/LG) | Alarm Indicator Light |
| 16 | ***** | Not Used |
| 17 | ***** | Not Used |
| 18 | 1 (DB) | Horn Relay Output |
| 19 | ***** | Not Used |
| 20 | ***** | Not Used |
| 21 | 218 (W/P) | Exterior Lights Output |
| 22 | ***** | Not Used |
| 23 | 57 (BK) | Ground |
| 24 | ***** | Not Used |
| 25 | ***** | Not Used |
| 26 | 57 (BK) | Ground |
ANTI-THEFT/CPU MODULE CONNECTOR CIRCUITS
| Pin No. | Circuit (Color) | Function |
|---|---|---|
| A | 323 (GN/O) | Horn Relay |
| B | 262A (W/R) | Headlight Relay |
| C | 909 (LG/Y) | Starter Interrupt Relay |
| D | 901 (LG) | Instrument Cluster |
| E | ***** | Not Used |
| F | 904 (Y/R) | Power Door Lock Switches |
| G | ***** | Not Used |
| H | 906 (LG/R) | Liftgate Switch |
| I | ***** | Not Used |
| J | 301A (R) | Liftgate Lamp Switch |
| K | 905 (BR/Y) | LH Pwr. Door Motor Switch |
| L | 910 (Y) | RH Pwr. Door Motor Switch |
| M | 115 (GN/R) | Flasher Module |
| N | 908 (BR/W) | Hood Switch |
| O-T | ***** | Not Used |
INSTRUMENT CLUSTER MODULE CONNECTOR CIRCUITS
| Pin No. | Circuit (Color) | Function |
|---|---|---|
| 2A | 52F (BK) | Ground |
| 2B | 305C (GN/Y) | Inst. Panel Dimmer Switch |
| 2C | 80H (O) | Parking Light Relay |
| 2D | 301B (R) | Trunk Compart. Light Sw. |
| 2E | 731 (GN) | Tach Signal From Ignition |
| 2F | 110 (P/Y) | Oil Pressure Sender |
| 2G | 746 (BL) | Malfunction Light Signal |
| 2H | 307 (BR/BK) | Seat Belt Light Signal From CPU |
| 2I | 824 (BR/Y) | O/D Off Light Signal |
| 2J | 901A (LG) | Theft Warning Light Signal |
| 2K | 84R (BL/R) | Power |
| 2L | 952A (R/GN) | Air Bag Diag. Module |
| 2M | 244 (W/R) | Inertia Fuel Cutoff Switch |
| 2N | 117C (GN/W) | RH Signal From Flasher |
| 2O | 300A (R/W) | Door Switches & CPU |
| 2P | 20 (W/BK) | Generator/Voltage Regulator Signal |
WARNING CHIME/CPU MODULE CONNECTOR CIRCUITS
| Pin No. | Circuit (Color) | Function |
|---|---|---|
| A | **** | Power |
| B | 300 (R/W) | Seat Belt Indicator |
| C | 84G (BL/R) | Power & Key |
| " | ******* | Reminder Switch |
| D | 53F (BK) | Ground |
| E | 300 (R/W) | Door Jamb Switches |
| " | ******* | & Ajar Light |
| F | 333D (GN) | Dome, Map & Foot Lights |
| G | 304 (PK) | Illuminated Entry Lights |
| H | ****** | Not Used |
| I | 303 (BL/Y) | Key Reminder Switch |
| J | 302 (R/Y) | Door Handle Switches |
| K | 308 (BR/W) | Seat Belt Buckle Switch |
| L | ***** | Not Used |
| M | ***** | Not Used |
| N | ***** | Not Used |
| O | 108 (R/Y) | Backup Lights & Switch |
| P | 80 (O) | Rear & Dimmer Lights |
| " | ***** | & Parking Light Relay |
ANTI-THEFT DIAGNOSIS CHART (CONTINENTAL, COUGAR & THUNDERBIRD)
| Symptom | Pinpoint Test |
|---|---|
| Verify Alarm Arming | Test A |
| Verify Untriggered Alarm Disarming | Test B |
| Verify Alarm Activation | Test C |
| Verify Triggered Alarm Disarming | Test D |
| Vehicle Will Not Crank | Test E |
| Alarm Light Is Always On | Test F |
| Alarm Light Does Not Work | Test G |
| Horn, Headlights & Parking Lights Always On | Test H |
| System Activates Falsely | Test I |
| Door & Trunk Switch Diagnostics | Test J |
ANTI-THEFT DIAGNOSIS CHART (MARK VII & TOWN CAR)
| Symptom | Pinpoint Test |
|---|---|
| Verify Alarm Arming | Test A |
| Verify Untriggered Alarm Disarming | Test B |
| Verify Alarm Activation | Test C |
| Verify Triggered Alarm Disarming | Test D |
| Vehicle Will Not Crank | Test E |
| Alarm Light Is Always On | Test F |
| Alarm Light Does Not Work | Test G |
| Horn, Headlights & Parking Lights Always On | Test H |
| System Activates Falsely | Test I |
| Verify Ignition Lock Cylinder Sensor | Test J |
| Door/Trunk/Hood Switch & Ignition Sensor Diagnostics | Test K |
ANTI-THEFT DIAGNOSIS CHART (PROBE)
| Symptom | See Pinpoint Test K, Step |
|---|---|
| System Does Not Operate | Step 1 |
| Alarm Light Does Not Light | Step 6 |
| Alarm Light Is Always On | Step 9 |
| System Disarms But Vehicle Will Not Start | Step 11 |
| Vehicle Starts With System Armed | Step 11 |
| Hazard Lights Do Not Flash | Step 12 |
| Horn Does Not Sound Alarm | Step 13 |
| Headlights Do Not Light | Step 14 |
| Alarm Does Not Work When Manual Or Power Door Locks Are Used | Step 15 |
| Alarm Does Not Arm With Power Door Locks | Step 15 |
| Alarm Goes Off When Alarm Is Armed | Step 15 |
| Alarm Does Not Work When Interior Liftgate Switch Is Operated | Step 18 |
| Alarm Does Not Work When Hood Is Opened | Step 19 |
| Alarm Does Not Deactivate When Door Key Is Used | Step 22 |
| Alarm Does Not Deactivate When Liftgate Key Is Used | Step 25 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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