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I tried to install an XROSS aftermarket Chinese Android stereo in my 2010 Fit Sport non/Navi and blew some fuses . Turns Out they sent the wrong wiring harness. So I stuck it in the back of my car and roll around with it like a dead squirrel.
back a year later, now December 2018, I purchased a 10.1 inch Chinese android eight that one aftermarket stereo pre-installed in a 2010 Honda fit trim plate.
I tested the radio fuse and the fuses under the orange puller in the fuse box and replaced those that were blown.
After plugging it all in, Nothing. So I tested power at the wiring harness and found constant power available on the yellow wire but no power available at the accessory wire (red)
Plugging the radio directly in to a 12v power supply fires up the device just fine. But so far, not from my wiring harness.
Which fuse controls the accessory switch enabled at the ignition switch?
Power sources in the Fit wiring harness have both keyed power and constant power circuits. I assume you checked all the fuses in the under dash fuse box with the ignition switch on? With the ignition switch off, the only circuits you can check are the hot all the time circuits.
You can test all the under dash fuses without having to remove any of them. Use a test light, ground it, and then touch the tip of the test light probe to each small test hole on the front face of each fuse- one at a time, with the ignition switch turned on. You should be able to test all fuses in the panel in under 5 minutes. Obviously replace any fuse that does not illuminate the test light in both test holes on each fuse, with a same amperage fuse.
The stock radio wiring for the Fit should have one power wire to it that's hot all the time to run things like the clock in the radio that needs constant power to keep it accurate. The keyed radio power source shuts the radio off when you shut the car off and doesn't leave the radio powered up that would lead to a run down battery.
