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Discussion Starter #1
Does anyone know which wire i need to splice into so my guages light up with my dash lights on a 2002 Lb7/

Also does anyone know where to plug in a brake controller?
Thanks
 

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Discussion Starter #2
Anyone.......?
 

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Not sure about the gauges but as far as the brake controller goes, look down by the pedals under the dash. You will see a black box with a long plastic hex-nut in the center. Remove the hex nut and take that cover off.
If you look at the back of that cover, it will have a diagram of what all the connectors are. You want the one marked trailer.
The controller will plug in on the top left, second connector over.
As far as the gauges go, maybe you could splice into the wire for the headlight switch.
 

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i spliced into the gray wire behind the dimmer control so they would dim with my gauge lights also. use a test light to find the exact wire on your truck
 

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I spliced into my cab-light wires for the guage lights. As for the brake here should be a factory controller, there should be a factory connection for it under the dash, on the drivers side, kinda by the pedals.
 
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