Picked up a Roush boost gauge from AM with the intent on installing myself. Flew through the gauge and pod adapter installation and thats when the problems start. Instructions are extremely vague and looking for a 12v power source is kicking my butt. I have tried an "add a circuit" tapping into what I considered safe in my SJB in the interior passenger kick panel with no luck. After I get off work tomorrow I guess ill pull the radio out and tap into the radio 12v wire (the switched one I believe?) Now comes the vacuum line.... WTH am I suppose to tap into for that?! Every bit of research I come up with shows different gen mustangs and nothing applicable to my install and its driving me absolutely crazy. Anyone else have advice on any of this? End result I would like the gauge to turn on (white) with the key cycled on and stay on until I turn the car off, not hooked up solely to the headlights.

 

Look for a "hot with key on" circuit for the 12v source. Any vacuum line coming off the manifold will work.

 

Edit, Finally got the thing wired up now just to run the vacuum line through the firewall and tap into somewhere on the intake manifold. If it helps anyone in the future on the Roush gauge install I will write up a "install for dummies" version because frankly I'm not good with electrical and this was all a learning experience for me.