2011ford escape Does the entire smart junction box have to be replaced due to a left turn signal which clicks too fast but which works fine even if it blinks fast?

Question edited for clarity.
Question moved to sub category.

Great advice and education on Ford SJB from our professional auto technician and electronics guru.

Jeff Armer Mar 23, 2022
They normally flash fast when a bulb is burnt out . There is no flasher , SJB - smart junction box - fords BCM - body control module turns the flashers on and off .

Principles of Operation

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 position, or the hazard lamp switch is engaged, that input signal is routed to ground.

When the SJB receives an input from the multifunction or hazard switch indicating a request for a turn signal or hazard lamps, the SJB then supplies voltage to the appropriate turn lamps.

Hooking up a factory or some other type professional scan tool to check for codes in the SJB would be the first step in a diagnoses for this .

B1499 Lamps, Left Turn Signal Failure If a turn signal is inoperative, Go To Pinpoint Test O .
If a turn signal is always on, Go To Pinpoint Test N .
B1502 Lamps, Left Turn Signal Short to Ground Go To Pinpoint Test O .
Test N .
B2282 Left Turn Signal Switch/Circuit Short to Ground Go To Pinpoint Test N .


Your best bet , take it to a qualified repair shop.

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Fast flashing though, check the bulbs and in particular, the marker bulb on the left side. And never use LED bulbs in a vehicle that wasn't made for them.
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Would you like to take a crack at this one Jeff. I told him, but he doesn't believe me. I remember that technical site with the guy who turned the headlights off inside the workshop to not blind another tech, and the problem on the scanner, or oscilloscope went away.

https://www.fixya.com/cars/t29867334-when_push_brake_chimes_go_off_or_turn#cmnt_0

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Hello Gayle , your vehicle does not have a flasher relay . The flashers are controlled by a computer or module . The ford SJB - smart junction box fords body control module . What is the problem you are having ? No hazard lights , no turn signals - none at all ,or flashing real fast ?

Doesn't have a flasher relay , the SJB - smart junction box (computer) controls the flashers . If it were a flasher relay none would work .
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 pressed, 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.
The timed on/off cycle is determined by the SJB and is set to flash approximately 80 times per minute if both the front and rear turn lamps operate correctly. If an individual turn signal lamp is inoperative, the SJB flashes the remaining turn lamp approximately 160 times per minute.

Your best bet , take it to a qualified repair shop. They will hook up a factory ore professional tool a read DTC'S - diagnostic trouble codes in the smart junction box . Don't take it to a auto parts store an expect them too. They can not read these type code's .
Smart Junction Box (SJB) (DTC Chart DTC Description Action B2071 Hazard Switch Signal Short to Ground Go To Pinpoint Test N . B2281 Right Turn Switch Short to Ground Go To Pinpoint Test L . B2282 Left Turn Switch Short to Ground Go To Pinpoint Test L . B2A27 Right Front Turn Lamp Circuit Open Go To Pinpoint Test M . B2A28 Right Front Turn Lamp Circuit Short to Ground Go To Pinpoint Test M . B2A29 Left Front Turn Lamp Circuit Open Go To Pinpoint Test M . B2A2A Left Front Turn Lamp Circuit Short to Ground Go To Pinpoint Test M . All other DTCs - REFER to Section 419-10 .

Does not use a flasher , controlled by SJB - smart junction box , module - computer etc...
Turn Signal and Hazard Lamps
All turn signal outputs are controlled by the SJB. The multifunction switch and the hazard switch are hard-wired to the SJB. When the multifunction switch is in the left or right turn position, or the hazard switch is engaged, the SJB processes this information and outputs the appropriate command to the turn signal and hazard lamps. All turn signal lamps provide a lamp outage indication.

Rather then trying to guess your way to a repair , Take it to a qualified repair shop. Could have DTC'S - diagnostic trouble code's stored that point in the correct diagnostic path .

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

• Multifunction switch
• Hazard switch

• Circuitry
• Bulbs
• Smart junction box (SJB)

1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

1. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
   • check that the program card is correctly installed.
   • check the connections to the vehicle.
   • check the ignition switch position.

1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.

1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
   • CAN circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 .
   • No response/not equipped for SJB, refer to Section 419-10 .
   • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the self-test diagnostics for the SJB.

1. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index.

1. If no DTCs related to the concern are retrieved, GO to Symptom Chart .
2. Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index DTC Description Action B1342 ECU is Faulted CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved again, INSTALL a new SJB. REFER to Section 419-10 . TEST the system for normal operation. B1499 Lamp Turn Signal Left Circuit Failure Go To Pinpoint Test K . B1501 Lamp Turn Signal Left Circuit Short to Battery Go To Pinpoint Test K . B1503 Lamp Turn Signal Right Circuit Failure Go To Pinpoint Test K . B1505 Lamp Turn Signal Right Circuit Short to Battery Go To Pinpoint Test K . B2048 Left Rear Turn Lamp Circuit Short to Ground REFER to Stoplamps in this section to continue diagnosis. B2049 Left Rear Turn Lamp Circuit Open REFER to Stoplamps in this section to continue diagnosis. B2050 Right Rear Turn Lamp Circuit Short to Ground REFER to Stoplamps in this section to continue diagnosis. B2051 Right Rear Turn Lamp Circuit Open REFER to Stoplamps in this section to continue diagnosis. B2071 Hazard Switch Signal Short to Ground If the hazard lamps are inoperative, Go To Pinpoint Test L .
   If the hazard lamps are always on, Go To Pinpoint Test M . B2281 Right Turn Switch Short to Ground Go To Pinpoint Test J . B2282 Left Turn Switch Short to Ground Go To Pinpoint Test J . B2529 Left Rear Turn Lamp Circuit Failure REFER to Stoplamps in this section to continue diagnosis. All other DTCs - REFER to Section 419-10 .

F43 - 10 amp & F19 - 25 amp. both are located in the smart junction box , under the dash . Could be on the left or right side behind kick panel .

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)

Most flashers are built into the hazard switch. If yours was traced to the fuse panel/smart box, but all the lights work. I would leave it. The states that they have to flash. Nothing about how fast or slow they go. I have a car that does the same thing. Checked all the lights, they work..Mine's the hazard switch though.

Do you know anything about automotive electronic's ? body control modules , ford's SJB - smart junction box. Do you own a professional scan tool that can read codes in the SJB ? Auto part stores can not read these code's . Do you know how to do automotive electrical trouble shooting ,using a DVOM -digital volt ohm meter ? If not , your best bet would be to take your vehicle to a qualified repair shop.
Principles of Operation
The smart junction box (SJB) sends 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.
Do you know what a wiring diagram is ? Free one's here
http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size . Under system click on lighting ,then under subsystem click on turn signal lamp . Click the search button then the blue link .

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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