To light my bed lights up in the past I would use the grey / purple wire found in the driver's side kick panel. However, I'm using a relay on my new truck because there are so many more lights than previously and I want to be cautious. Given the wires will travel up the passenger side of the vehicle I was wondering if there is a trigger wire on the passenger side that indicates when a door is open (to turn the inside lights on). Does anyone know?

 

On 09+ models the trigger wires are behind the passenger side kick panel.

 

Here's a better picture of the correct plug.

 

Oh snap - THANK YOU!

 

No problem.