Brake Controller Wiring - CHMSL

[WarrenC]

Hi all, I'm currently trying to install a brake controller on my 24 XL Hybrid. I am trying to tap into the 3rd brake light, but can't access the light from the bed due to my bed cap. Looking to tap into the wire that leads from the driver side harness, up the C-pillar, and to the CHMSL. Anybody done this or know what wire to tap? These are the wiring I found in the loom that go to the roof/headliner. Thanks!

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[bgn]

Wrong harness - check the passenger side.

 

[Maverick_Dave]

On the right rear c-pillar, the side air bag is there too so be careful.

yellow-gray stripe

 

[Hot Runr Guy]

On the right rear c-pillar, the side air bag is there too so be careful.

yellow-gray stripe

@Maverick_Dave Is your schematic for the 2024 model year? My image came from the 2022 wiring manual that was once posted.

Thanks, HRG

 

[Maverick_Dave]

@Maverick_Dave Is your schematic for the 2024 model year? ...

Thanks, HRG

Yes.
Your pic shows the cargo/puddle lamps

 

[Quest]

Have a look at this thread, that's the easiest area to access the wiring
Your looking for the 22ga yellow & grey wire
Its very small & at my age I need magnifying glasses to to see the difference in colors
That circuits origin is at the BCM, the passenger footwell fuse box


https://www.mavericktruckclub.com/forum/threads/ac-power-behind-rear-seat.78327/#post-1289375

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