What is a smart junction box - 2007 Ford Expedition Eddie Bauer EL

It is a known issue

https://www.google.com/search?q=2005+Ford+Freestar+Van+%2F+with+power+door+locks.+Smart+Junction+Box

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Ford GEM Module Replacement Ford Escape Mercury Mariner GEM Module Removal...
Looks like quite a task to replace.
FORD ESCAPE MULTIFUNCTION MODULE (SMART JUNCTION BOX)

It's inside the SJB - smart junction box ! It's non - serviceable . Is the air bag light lit on the instrument cluster ?Do you know what a smart junction box is ? It's a electronic module with a fuse / relay box built into it .

Module Controlled Functions The smart junction box (SJB) is the multifunction electronic control module on this vehicle. The SJB is a combination of a multifunction control module and a central junction box (CJB). SJB functions control multiple systems, which include:

• auto locks
• exterior lamps
• illuminated entry and interior lamps
• perimeter anti-theft alarm
• power door locks
• rear windshield wiper
• remote keyless entry (RKE) keypad
• RKE system
• tire pressure monitoring system (TPMS)

The SJB is located under the front passenger side floor console. For removal information, refer to Smart Junction Box (SJB) in this section. For additional information on the interior lamps and illuminated entry, refer to Section 417-02 . For additional information on the exterior lighting, refer to Section 417-01 . For additional information on the power door locks, the RKE keypad, and the RKE system, refer to Section 501-14 . For additional information on the rear windshield wiper, refer to Section 501-16 . For additional information on the perimeter anti-theft, refer to Section 419-01A . For additional information on the climate control system, refer to Section 412-00A (Escape, Mariner), or Section 412-00B (Escape Hybrid). For additional information on the warning chimes, refer to Section 413-09 . For additiona information on the TPMS, refer to Section 204-04 .

What do you want to know ? Automatic smart junction box ? It's called just SJB - smart junction box !

Sorry but it is non - serviceable , location smart junction box ! If the relay were bad you would need to replace the smart junction box . Is the air bag light lit ! ( possible clock spring )
Inspection and Verification

1. Verify the customer concern.

1. Visually inspect the following for obvious signs of mechanical or electrical damage.

Visual Inspection Chart Mechanical Electrical

• Horn
• Horn switch (part of the steering wheel)

• Battery junction box (BJB) fuse 2 (50A)
• Smart junction box (SJB) fuse 14 (20A)
• Circuitry
• Clockspring
• BJB
• SJB

Symptom Chart Condition Possible Sources Action

• The horn is inoperative

• Fuse
• Circuitry
• Steering wheel switch harness
• Horn
• Clockspring
• Horn switch (part of the steering wheel)
• Smart junction box (SJB)

• Go To Pinpoint Test A .

Symptom Chart Condition Possible Sources Action

• No communication with the smart junction box (SJB) module

• Circuitry
• Smart junction box (SJB)

• REFER to Section 418-00 .

• All power windows are inoperative

• Circuitry
• Window control switch
• Circuit breaker
• Smart junction box (SJB)
• Delayed accessory relay

• Go To Pinpoint Test A .

Is the air bag light lit on the instrument cluster ? The horn relay isn't under the hood in the engine compartment , it's in the SJB - smart junction box located inside the passager compartment . Under the dash panel left side . You can take the relay back to autozone because it's not the right one ! The relay is inside the smart junction box ,soldered to the printed circuit board !
Horn Horn
The vehicle is equipped with dual horns. The horns are mounted in the LF frame rail corner behind the front bumper.
The horn system consists of the following components:

• steering wheel horn switches
• clockspring
• horns
• smart junction box (SJB)

Horn Switch, Steering Wheel Mounted
The horn switches are incorporated within the driver side air bag module in the steering wheel. The switches are grounded and control the horns through the clockspring. For removal and installation of the driver side air bag module, refer to Section 501-20B .
Visual Inspection Chart Mechanical Electrical

• Horn
• Horn switch

• Battery junction box (BJB) fuse 1 (60A)
• Smart junction box (SJB) fuse 38 (15A).
• Circuitry
• Speed control actuator
• Clockspring
• SJB

Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index
DTC Description Source Action B1217 Horn relay coil circuit failure Smart junction box (SJB) If the horn is inoperative, Go To Pinpoint Test A . If horns sound continuously, Go To Pinpoint Test B . B1218 Horn relay coil circuit short to battery Smart junction box (SJB) Go To Pinpoint Test A .
Any codes ?
Symptom Chart NOTE: Refer to Wiring Diagrams for connector numbers stated in the pinpoint test. Condition Possible Sources Action

• The horn is inoperative

• Battery junction box (BJB) fuse 1 (60A).
• Smart junction box (SJB) fuse 38 (15A).
• Circuitry.
• SJB.
• Horn switch.
• Horn.
• Speed control actuator.

• Go To Pinpoint Test A .

Your best bet , take it to a qualified ford service center .

Has no flasher module , uses SJB - smart junction box . FORD'S BCM - body control module .
The smart junction box (SJB) monitors the multifunction switch position by sending multiple voltage reference signals to the multifunction switch. When the multifunction switch is in the LH or RH TURN positions, or the hazard lamp switch is engaged, that input signal is routed to ground.
When the SJB receives a request for a turn signal or hazard lamps, the SJB supplies voltage to the appropriate turn lamps.

You could by a used one off ebay or a remanufactured one . lot less cost wise. But you would need ford , mercury dealer program it . Yes $600 bucks sounds right from the dealer .
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The 2003 Expedition smart junction box was formerly called a GEM module in previous years. It has relays that control your keyless entry codes, the relays that control the dome lights and the delayed radio shutoff as well as other functions.

On a 2003 Expedition, the sjb (smart junction box) is located on the inside passenger's side kick panel below the glove box. It is most easily accessed by opening the glove box and squezzing the limiting tabs on each side so the glove box can open fully and tilt forward. It is approximately 6" long by 4" tall and about 1 3/4" thick. The part number on the label will be 2L1T-15K602-AN or similar for 2003 Expeditions.

Fuse #23 is a 15 amp fuse in the smart junction box. This fuse protects the lights in your question as well as the exterior rear view mirror lamps. the smart junction box is located under dash on driver side kick panel.