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.
2005 Mercury Mariner 3.0 1, FWDFACTORY OEM SERVICE PROCEDURE
Smart Junction Box (SJB) Connector End View (C2280A)
C2280A CONNECTOR SPECIFICATION
| Pin | Circuit | Gauge | Circuit Function | Qualifier |
|---|---|---|---|---|
| 1 | * | * | not used | |
| 2 | * | * | not used | |
| 3 | 956 (OG-LG) | 18 | Voltage supplied at all times (overload protected) | |
| 4 | * | * | not used | |
| 5 | * | * | not used | |
| 6 | 1715 (RD) | 18 | Voltage supplied at all times (overload protected) | |
| 7 | 1050 (LG-VT) | 20 | Voltage supplied in Start and Run (overload protected) | |
| 8 | 41 (BK-LB) | 20 | Voltage supplied in Start and Run (overload protected) | |
| 9 | 605 (RD) | 20 | Shift lock solenoid control | |
| 10 | 137 (YE-BK) | 20 | Accessory delay relay output | |
| 11 | * | * | not used | |
| 12 | 1002 (BK-PK) | 20 | Voltage in Run or Accessory (overload protected) | |
| 13 | 40 (LB-WH) | 16 | Voltage in Run or Accessory (overload protected) | |
| 14 | 6 (YE-LG) | 20 | Horn relay control | |
| 15 | * | * | not used | |
| 16 | 297 (BK-LG) | 18 | Voltage in Run or Accessory (overload protected) | |
| 17 | * | * | not used | |
| 18 | * | * | not used | |
| 19 | 3049 (BK-LG) | 20 | Voltage supplied in Start and Run (overload protected) | |
| 20 | 1654 (OG-YE) | 20 | Voltage supplied in Start and Run (overload protected) | Early production |
| 20 | 937 (RD-WH) | 20 | Voltage supplied in Start and Run (overload protected) | |
| 21 | 570 (BK-WH) | 18 | Ground | |
| 22 | * | * | not used | |
| 23 | * | * | not used | |
| 24 | 640 (RD-YE) | 20 | Voltage supplied in Start and Run (overload protected) | |
| 25 | 1847 (WH-OG) | 20 | Medium speed CAN bus + | |
| 26 | 1848 (PK-OG) | 20 Medium speed CAN bus - | ||
| 27 | * | * | not used | |
| 28 | 601 (LB-PK) | 20 | Voltage supplied in Start and Run (overload protected) | |
| 29 | * | * | not used | |
| 30 | * | * | not used | |
| 31 | * | * | not used | |
| 32 | * | * | not used |
Factory Service Tools
Use the Manual With the Right Hardware
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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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