Wiring a 3rd brake light and inside light

[smokedbystang]

Trying to wire up a 3rd brake light for my topper on my 2020 2500 Tradesman. I found these 3 wires under the spare. Any one of these for the brake lights? Or power for hooking up the interior light? My 2012 1500 had a single wire under the spare for the brake light. Not sure what these 3 wires are for. Any help would be appreciated. Thanks.

 

[jadmt]

yes the white with lavender stripe is the 3rd brake light.

 

[smokedbystang]

yes the white with lavender stripe is the 3rd brake light.

Thank you

 

[DarkNight]

Sorry for bring a old post up, but this helped me when wiring up my 3rd brake light too. Any idea what the other two wires are for?

 

[zerogravity779]

Sorry for bring a old post up, but this helped me when wiring up my 3rd brake light too. Any idea what the other two wires are for?

Large pink is constant 12+
Red with white is ignition 12+
White with purple is brake light.

Found the above info located here:

Blunt Cut Wires @ Rear Of Truck

I have a 2019 Power Wagon, which doesn’t have auxiliary switches because Power Wagon. My understanding is it is not offered on the PW because the grey connector under the dash that would be for aux switch wiring is instead used for the swaybar and lockers wiring. While installing my AEV bumper...

hdrams.com

 

[Trooper]

useful info, I installed a frame over my soft topper today, was PIA finding the location of this but I only found the white/purple (all I needed,) the other two were not there.