Radio-no power to fuse #28

[Mike Thomas]

I have a 2008 expedition EB with oem radio/ nav. There is no power to the 5amp fuse #28 for the radio on either side of the fuse (with key on.) The radio stopped after I had to charge the battery from a parasitic draw. I finally stopped the draw after disconnecting all the wires from the back of the radio. After a week of sitting it started right up. I’m not sure if the radio is no good or the amplifier without having power to #28. I do have power to #1 pin. I don’t know why the wire has no power before and after fuse. I did all testing with an electrical meter. I’ve seen that other people have had the same problem with no power to #28 but I could not find anyone had a solution. Please if you could help I would appreciate it.

 

[stamp11127]

You may need to pull the fuse box to inspect the bus bar or circuit board inside for failure.

 

[Mike Thomas]

Has anyone else experience this problem and solved this issue? There have been many with this problem but nobody post after fixing it. Thank you stamp11127 for your advise. I would like to know if others have corrected this situation with a definite fix. Thank you all for your help. Michael

 

[stamp11127]

I doubt you will get many answers to your issue. The one thing with electric problems is most people shy away from fixing them since they don't understand the "magic" of electricity.

 

[Mike Thomas]

Thank you stamp11127 for keeping me in the loop. I haven’t had time to pull the fuse block yet but I was hoping to pull power behind the radio temporarily to see if the radio is good or shot. If you have a suggestion I would appreciate any though that you have experienced. Thank you again

 

[Mike Thomas]

I was also wondering where the parasitic draw came from before I disconnected the plugs from the radio. Amplifier, radio, etc.. Thank you again

 

[stamp11127]

When you checked for power at the fuse was the ignition switch set to "run"? Did you also check other fuses to prove the meter is working correctly?

 

[Mike Thomas]

Yes to both questions.

 

[stamp11127]

Two options:
1) Inspection time then. For that fuse block I would expect a circuit board with copper traces similar to what is used on the smart junction boxes. I would expect a burned trace. Usually can be repaired with soldering on a wire over the burned section.

2) Using a wiring diagran or with the fuse block apart, locate the power wire to the radio and run a new inline fuse.

 

[Mike Thomas]

Where can I find a schematic from the interior fuse box? Is there a free site to see the wiring diagram for an 08 expedition Eddie Bauer or does anyone on this forum have one. I would like to thank all for helping especially stamp11127.