Bed Cap wiring

[awaywego]

If I install a bed cap (LEER or A.R.E.), is there easy place on the truck to tap in for power for the cap's brake light?

WIth all the newfangled ways that cirucits work, I don't know if tapping into the brake light circuit would mess up something due to the added electrical load/resistance. Plus, I'd rather not do a splice if there is a ready-made plug or port somewhere in the brake circuit.

Thanks for any advice you can provide.

 

[Patsy1099]

Can’t you just tap the 7pin trailer harness?

 

[swarggs]

There is usually a wire pre installed on the truck for this exact purpose. On my 4th gen it was in the trailer harness behind the rear bumper.

Sent from my SM-G960U1 using Tapatalk

 

[steindog]

There is usually a wire pre installed on the truck for this exact purpose. On my 4th gen it was in the trailer harness behind the rear bumper.

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It took me weeks to finally get this pretty useless reply pasted below from FCA on this very topic. The camper dealers have to now use a logic module that utilizes break light wiring but prevents the 3rd break light from flashing during signaling. Engineers really dropped the ball by deleting that wire in my opinion. Now when the module fails you'll have to dig back into the wiring to replace. LAME!!
"Thanks for your technical inquiry. Your are correct. For the 2019 RAM truck and later, there is no longer a wiring harness break-out for the 3rd stop light (or CHMSL) in application for a box cover or camper top. You may want to see your dealer parts department for other options which are available. We appreciate your RAM loyalty and sorry for any inconvenience this may have caused."

Regards, Marvin, RAM Customer Support

 

[ammdrew]

CHMSL wire tap for topper

So this is my connector from under the cab. the Brake signal pin is present so now I need to taknapart the other side and see if it has a nice little wire just waiting to be clipped into.

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