Here it is: My harness for some reason is not getting any power to the constant power wire (yellow), on my Pioneer headunit. I've checked for continuity in the harness and there is none. Every other wire works except for the one that feeds constant power, making it impossible to save the time for the clock, and even worse, the audio settings that take me 4 minutes to adjust. I initially just ran a wire from my 15A Radio/Clock fuse, but it doesn't get constant power like the harness wire did.

Now my headunit has a fuse attached onto the constant power wire, so I'm assuming I could throw 30A at the headunit, and it'd be fine, but I know nothing about electrical so I'm probably wrong.

HERE'S THE QUESTION I'M ASKING:

Which fuse can I run a wire from that will give it constant power, meaning even when I turn my key back and forth?

Any answers will be greatly appreciated. Thanks, Rob.

 

Bump...

 

Well first of all I would physicaly pull and inspect all fuses under the dash and under the hood. It sounds like there has to be a blown fuse. But if not I would run a constant wire from your ignition harness in the steering column. Do not replace the the fuse in the deck with a larger fuse. Replace it with the same size fuse if its blown. If you tell the year make and model I can tell you wich wire is your constant in the ignition harness.

 

Found it. 7.5A Backup fuse. Sorry I made it seem like such a big deal. Thanks, Rob.