1999 Ford E-250 Econoline Radio Wiring Harness | Advance Compare 1999 Ford E-250 Econoline Radio Wiring Harness brands. Check prices & reviews on aftermarket & stock parts for your 1999 E-250 Econoline Radio Wiring Harness. Order your parts online or pick them up in-store at your local Advance Auto Parts. SOLVED: I need the wiring diagram for a 1999 Ford E-250 HI, I e-mailed you yesterday about the Ford E-250 Radio wiring diagram. You sent me the one for a F-250 Truck. My constant 12v+ wire is Red with a white stripe and the other colors are not right.