2003 ford f 350 super duty 7.3 l

best thing to do is take it to a indepent radio shop that installs them,they can get it going.

fuse map for f 350 2003 7.3 liter

Go to Best Buy and buy a after Market Wiring Adapter for After market radio install.They have a Color Coded print sheet in box that will fix your problem of not knowing what wire is what.I just did my 1999 ford f350 crew cab with great Sucess..Enjoy.

Better yet, you can buy a new pig tail that has all the correct wires in the proper place on the plug. Connect the colours, and plug into the adapter kit for the new radio. The advantage to this is that should you ever need to remove the head unit, it is a simple unplug situation, not cut and reconnect when you install again.