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Turn signal failure

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Old Feb 8, 2023 | 08:49 PM
  #1  
Dev Mak's Avatar
Dev Mak
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Turn signal failure

2022 F250 super duty
I have a lariat with LED lights and my rear right turn signal is staying on solid and doesn’t flash. Even when blinker is off the tail light is staying on.

 
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Old Feb 8, 2023 | 10:15 PM
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There is lots of issues with the white connector that is on the inside of the right hand side of the trailer hitch so I would unplug it and check for corrosion, dirt, water (ice)...
Here's what the service manual has to say

D1 DETERMINE IF ANY TURN LAMP IS ALWAYS ON
  • Ignition ON.
  • Activate the hazard lamp function.
  • Observe the rear turn lamps.

Is any turn lamp continuously illuminated (not flashing)?
Yes GO to D2 No GO to D3

D2 CHECK THE FRONT TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
  • Deactivate the hazard lamp function.
  • Ignition OFF.
  • Disconnect BCM C2280E .
  • Ignition ON.

Does the turn lamp in question continue to illuminate?
Yes REPAIR the affected circuit. No GO to D8



D8 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation). No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.


BCM is behind the front passenger kick panel
 
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Old Feb 9, 2023 | 07:23 AM
  #3  
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I would reverse all the wiring you connected for the light bar and see if the condition is still present. Eliminate the easiest thing first.
 
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