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.
Smart Junction Box (SJB)
2010 Mercury Mariner Hybrid, AWDSECTION Smart Junction Box (SJB)
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The SJB is a combination of a multifunction electronic module and an interior fuse panel. It is located on the LH A-pillar, under the instrument panel. SJB functions control multiple vehicle systems, which include:
- Battery saver relay
- Brake shift interlock
- Delayed accessory
- Exterior lighting
- Global open (front windows only) (MKZ only, if equipped)
- Heated rear window
- Horn
- Interior lighting
- Moonroof (MKZ only, if equipped)
- Perimeter anti-theft
- Power locks
- Remote Keyless Entry (RKE)
- Tire Pressure Monitoring System (TPMS)
- Windshield wipers
RENDER: 1.0x
NO RELATED
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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.