I know this has been addressed here before but I did a big search and came up with nothing. I want to find a wire under my dash that is hot only when the ignition is turned on so I can wire lites into my ride rite pressure gauge which I will mount on the dash. I have an 07.

 

I just installed gauges in my '06. There is a large pink wire with yellow strip you can use for 12v switched. It is located in the left corner of the firewall behind the e-brake pedal. Look in the large bundle of wires going into the large white connector. I used a wire tap and it works great.

 

Thx, Moparnut. That worked perfectly.

 

What I really ment to ask for was a wire that is only hot when the lights are on but this works also

 

Sounds like you already used the pink wire. If you want to connect it to the light switch, there is a orange wire with black stripe on the headlight switch that you can use and it will dim the gauge light with the rest of your gauges. Actually mine had 2 orange/black wires, the one I used is on the left side of the connector as your looking at the switch from the driver seat. If you have a volt meter you can check the wire by turning on the lights and turn the dimmer switch, the voltage should change as you move the switch.