I'm hooking up my prosport gauges and wanted to know which wire on the radio harness was a constant 12v source, red or yellow?

Thanks!

 

yellow should be the memory wire, so there for it is the constant 12v source wire. red should be the ingition wire for the on/off for the headunit, there for the red wire is only 12v wen the car is turned on

 

^what he said. I dont know much about the yellow wire but if its between yellow and red the constant source would be yellow. The red wire is a switched 12v source. Why are you looking for a constant power wire. Wouldnt it make sense for your gauges to only turn on when you turn on your car or i guess accessories?

 

The actual wire that determines the gauge color on the prosports requires a switched 12volt, so the gauges do turn off. The constant source allows for the gauges to retain memory and what not

 

ok that makes sence. Sorry for my stupidity...

 

i just hook mine up with the wire on the clock... changes color with the color... i got prosport too by the way..