"check right rear light" ON ?

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adrian

adrian

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On the dashboard of my sport trac 2008 V8 the red message of "check right rear light" appears, flashing very fast but the backlight bulb turn on, I already changed the lights several times and they all turn on but flashing very fast, on the left side it works normal , that may be, I appreciate your comments
 
Did you change it to a led? If not you either have a loss socket or have a bad build and not seeing it. Maybe on a duel element bulb


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Clean the socket and try another bulb, and make sure its the right bulb.....
 
thanks, change the bulb and the new OEM socket and still follow the same problem, some other suggestion?
 

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Did you solder the wires for the socket?? The truck uses resistance to test and if it’s off this happens. Also it could be a front bulb even though it says rear.
How old is your battery?
 
Do these trucks not have a turn signal flasher like the old 3 pronged ones you would replace when you start getting a fast flash? If they do, I'd replace that.
 
I’ll look this up in my scanner and see how and why this is going on
I also have a account with ford. I’m a retired/ disabled master tech and have more then I can count, Ford service tech credentials and certifications from Ford and countless other manufacturers ,so give me a few days and I’ll try to figure something out for you


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thanks, I have already changed the socket on the back, soldered the cables, I used different brands of 3157 bulbs, and it does the same problem, they are not LED bulbs, on the left side there is no problem but on the right side it flashes very fast forward and back, in the front I already did the same procedure and it remains the same :(
 
It should have two flasher relays. One for the four way flashers and one for the blinkers. On of them is weak. You could just flip them around to the other and see what happens. Put the four way into the blinker and blinker into the four way flasher
And see what happens


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Apparently on the board is the blinker but it does not appear as such, and change the board with another from another truck and do the same, the fault must be before the board because when pressing the brake pedal detects that the focus of the rear light does not It works when done if you turn on, I really have no idea where to look for the fault, so I ask for your expert help and comments, thanks
 
Change the front marker bulb and directional one too... ive seen stupid stuff like that.
 
Thanks, and where is the external flasher relay located?, specially in a ford explorer sport trac 2008
 
you cannot replace the relays for turn signals in these vehicles. the relays are built into the Smart junction box.
i am diagnosing a similar issue currently. i have a wiring diagram on my post for this
 

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