For my phantom fuel pressure guage I just tapped into a wire in the wire harness for the guage cluster. There are a few 12volt and ground wires in those harneses. You just need to look in your service manual to determine which color wire you want to tap into. Then I just soldered and shrink wraped the connection. I also put in a in line fuse to protect the guage and factory circuts. everything works great. and for the lights, they come on and dime with the factory guages as well!
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more!