XLT OEM Bed Lights Install

[rio]

I noticed that after the unsuccessful attempt, two DTCs were thrown: one in BdyCM and one in GFM3 (whatever that is). The one in BdyCM is related to the bed lamp output and is detecting what I'm assuming is an open circuit. See below...

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[bizz]

I noticed that after the unsuccessful attempt, two DTCs were thrown: one in BdyCM and one in GFM3 (whatever that is). The one in BdyCM is related to the bed lamp output and is detecting what I'm assuming is an open circuit. See below...

My truck set the same dtc in the body control module but I don’t believe the other module set a code but I’d have to double check. The fact that the code description says circuit short to open makes me thinks it’s missing a necessary wire somewhere to complete the circuit.

 

[rio]

My truck set the same dtc in the body control module but I don’t believe the other module set a code but I’d have to double check. The fact that the code description says circuit short to open makes me thinks it’s missing a necessary wire somewhere to complete the circuit.

I wonder if it's as simple as a missing fuse. There's a bunch of fuses related to trailer lighting. I'll take a look at the fuse boxes and see what's there.
That said, I wouldn't think that a missing fuse would trigger an open circuit DTC since I would imagine these to be related to data signals.

 

[bizz]

Found this wiring diagram but unless I'm reading it wrong it just looked like the BCM controls the power to the bed lamp circuit.

 

[rio]

Found this wiring diagram but unless I'm reading it wrong it just looked like the BCM controls the power to the bed lamp circuit.

Thanks. Looks like we can do some continuity checks following that diagram. Do you know what pins 1-5 on the left are?

 

[Bostondrew]

About to finally get my 24 pro with tow tech that I’ve been waiting so long for. Wondering if with tow tech package are the bed lights just plug and play, or is forescan stuff required? Also hoping this working on my24…..

 

[turbobeast]

Did anyone with a '22 Pro without tow tech or zone lighting ever get this to work? Thanks for any guidance.

 

[captcory]

could not get this to work on my 2023 no option PRO with factory enabled zone lighting. thinking there is a wire missing? I did all the FORscan changes and still no dice.

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