Need Help. The radio (aftermarket) in my F-250does not work. It does not have any memory power. Has constant power but no power from ignition. And all fuses seem to be okay.

If it's an aftermarket radio here's what you do: 1. Take an electrical tester and check it to make sure it's grounded properly to test (not a multimeter just a one-wire tester). 2. Turn of your ignition and take out the key because you don't need it. 3. Test an extra slot in your fusebox for constant power or use any slot(older vehicles only) with constant power. If you find power connect a wire to it and skip to step number four or if no luck just lead a wire to your battery through the firewall (don't forget to seal the hole you lead it through). 4. connect the constant power wire to the memory wire. If your radio wasn't struck by lightning and you're not confused this should always work.