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.
1999 Jeep Wrangler SE, AutomaticFACTORY OEM SERVICE PROCEDURE
Connector Identification
NOTE:
The following terminals are shown as viewed from harness side of connector. Only connectors with 3 or more terminals (pins) are included. For circuit identification and wiring diagram, see WRANGLER
wiring diagram in WIRING DIAGRAMS article.
CONNECTOR IDENTIFICATION
| Connector | Illustration |
|---|---|
| Accelerator Pedal Position Sensor | Fig 1 |
| Brakelight Switch | Fig 2 |
| Camshaft Position Sensor | Fig 3 |
| Controller Anti-Lock Brakes | Fig 4 |
| Crankshaft Position Sensor | Fig 5 |
| Data Link Connector | Fig 6 |
| Engine Oil Pressure Sensor | Fig 7 |
| Fuel Pump Module | Fig 8 |
| Governor Pressure Sensor | Fig 9 |
| Idle Air Control Motor | Fig 10 |
| Leak Detection Pump | Fig 11 |
| Manifold Absolute Pressure Sensor | Fig 12 |
| Park/Neutral Position Switch | Fig 13 |
| Powertrain Control Module | Fig 14 |
| Throttle Position Sensor | Fig 15 |
| Vehicle Speed Sensor | Fig 16 |
| 1/1-1/3 Heated Oxygen Sensor (Typical) | Fig 17 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.