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Yup, here's the thread on that project. Hard part is getting the cupholder from Ford with the LEDs. https://www.f150gen14.com/forum/threads/cup-holder-light-installation-media-bin-light-glove-box-light-ambient-lighting-change.8385/page-101#post-592214

Good write up with the pics, dirtygovnuh! Strymar57, check page 3 as well GR8BBQ pioneered tapping into the existing harness with some good info for his experience There's 2 paths in this thread for completing adding led lights to your truck bed. Replacing the harness or tapping in...

you will need 2 other cables that are interconnects between the lights and harness: Wire Jumper - Left, Center Part#:ML3Z14A411F Wire Jumper - Right, Center Part#:ML3Z14A411D these are what I used based on info early on in the thread.

Sorry to hear that! That's correct I didn't have the scales either and would agree "less mass movement sensor" represents the scales. Good luck with the adapter....with the pinout's shared in this forum it may be worth getting some plug pin keys and adjusting the wiring to work for what you...

Yeah man, best of luck! :) I was able to get this and the cup holder led ring installed today...THAT was way more tedious lol so many trim pieces to remove lol

SquigglyBrace, the J harness is a winner for my install. it arrived this afternoon and got everything installed and activated. the RL3Z13A409J I ordered translates to RL3T-13A409-DCE (this is what I received) I confirmed before pulling the old harness out that the led taillights worked...

Hour and a half later, and I have glowing cupholders. Bit bright out, but definitely working:) Thanks JHForman812 for the parts and dialog. The PDF instructions are great. I only did the cupholder install for mine. Took my time in removing the trim pieces....push button dash trim was the...

My J harness arrives today, will check it out see if it's a winner. previously I posted this: for those wondering which harness...using https://parts.ford.com/ and looking up your existing harness part number should show you the accessory connections to match against. for example: Part #...

SquigglyBrace, I have definitely NOT cracked the code...hopefully my 2nd swing at bat is a good one with this J harness. should be here in a few days. the variations are crazy on these things...very over engineered

Hey, yeah my truck has the BLIS system. it stands for Blind Spot Information System. Then there is also the scales that can tell you what your bed cargo load is. I don't have the scales on my truck. My undestanding is the " Less Mass Movement Sensor " is for trucks without the scale function...

Stopped back by the parts dept. and sure enough the same part "CB" they ordered has the leds with it. Double checked both boxes, other than the engineering number as JHForman812 mentioned...there's no difference. the clerk confirmed he didn't do anything different than I when ordering the...

Ah gotcha, hence the "Ford finally caught on" statement....got it. If a new part number emerges from this I will definitely share it. *this was a lot easier with my 2012! :P

Yup, the parts dept. made an honest effort...in this situation...even though the part sourced from "Ford Cloud" it tagged this parts shop and placed it in their inventory. So the part they sent to grab...was actually what I was returning. they ordered one for me that should be here tomorrow to...

Yup it did have the led light ring but no less as shown in other pics. At the shop now they are pulling one from the back to compare...will know shortly

Just received my cupholder assembly using the "CB" part and what I received did not include the LEDs. Gonna take it back and chat with the parts dept Hers the part number I received

Getting lucky on this one, able to return the harness minus shipping :) That J harness better do the trick! :)

Again referencing Earlgsxr600 post I screenshotted earlier the "J" harness appears to be what I'm after in supporting my LED taillights. I've reached out to the parts dept I bought the "E" harness from to see if I can return and swap out to the J. RL3Z13A409J 01/08/2024, F150, F-150, Crew...

Hit a bit of a snag with my install...apparently the E harness I received....doesn't support the LED taillights. I'm hunting now for another RL3Z-13A409 harness as this and the "K" mentioned previously don't support the LED tails :( If anyone has insight to the correct harness, I'd...

Looking back in the thread, Earlgsxr600 identified this part number as the upstream harness which should already be there. What you should be targetting is the r3lz13a409 harness that matches your accessory layout. Hope this helps!

the "E" harness came in yesterday...that was the last part I was waiting on. the actual part number I received is RL3T-12A409-BEE. Re-checking Ford Parts shows this to still be the E harness and should have all the connections for the existing stuff, inverter and now bed lights. for those...