Kenworth T800 lift axle/marker light

Hey guys I have a 2019 Kenworth T-800 tri axle, from factory the trailer lift axle switch is tied to the marker lights, I got the dash pulled apart and I can’t see any aftermarket wiring done to the switch it all looks pretty factory. How ya’ll reckon I go about figuring out which wire going to the marker switch is the signal wire for the lift axle..

 

Hey thanks for link! I saved that to my phone that’s gonna be helpful! The truck was outfitted by G&F truck bodies I don’t think they are in business anymore so I can’t contact them, I pulled the dash open this morning and found that the marker light switch in question didn’t have any obvious signal wire’s, although I did notice the only difference between the marker switch that controls the trailer lift axle had from the rest of the switches was the one circled connection where 2 wires are butted into one pin connection. Maybe 1 of those 2 wires is the signal wire I need to isolate.. I bought a factory trailer lift axle switch and I wanna get it wired in.

 

No they aren’t.