Aftermarket radio wiring

[mackseal 10]

Anyone know how to wire an aftermarket radio into a 69 fastback without connecting the wires to the fuse block. I would like to splice or connect in to an ignition wire and another constant 12v wire. Anyone know which wires will work. I don't have a wiring diagram.

[Big Secz 26]

This is what has always worked for me. You have two main wires, one for switchable power source and the other is a constant power source for the radio's memory. Use the wire for the factory radio for the switchable source. The factory radio harness has a two prong connector, one side is the switchable power source and the other is for the radio light. use a test light to figure out which is correct. Then you can use a bullet connector to plug into the side for the switchable source. No splicing required.

 

Now for the constant power source I always run a wire to the fuse block, but you do not need to splice into anything. with the key off use your test light and touch the end of each fuse and you will find one that is a constant power source. Then use a fork style metal connector on your new wire and simply slide it into the fuse block at the fuse that is getting the constant power. Done, and no splicing into anything.

[Guillaume69 150]

+1 The only difference in my set-up is that I used the cigarette lighter wire as my constant/memory power source. That's because I do not ever plan to use that device, and therefore, don't mind having it unplugged. It also happens to be be sitting very close from the radio, and the stock wire is long enough. No need to pull a new one, just add a bullet connector on the radio memory wire, like explained above for switched power.

 

G

Edited November 7, 2014 by Guillaume69