A new fuse installed, fixes the problem, but now the car wont start

ford
expedition

#1

Hello, I have a 2004 Ford Expedition that has been pretty good to me. Minor fixes mostly. Here is my question. The dome lights, brake lights, gauges, and blinkers stopped working suddenly. I replaced the fuse associated with the problem, and all the above now work, but the car wont start. When I remove the replaced fuse the car starts right up. Any idea of what might cause this?


#2

I’m not certain, but you may have reset the vehicle management computer by replacing the fuse. On my Expy, you’d need to reset the VMC by turning on/off the ignition key a number of times (on mine, until the power door locks cycle). Hope this helps.


#3

Thank you! Unfortunately that did not solve the issue. I am welcome to any other suggestions. I appreciate your time.


#4

I am amazed that all those functions were on one fuse. Were there any problems leading up to the fuse failing? Were there any surprises when the burned fuse was replaced?

I suspect the short circuit that blew your fuse somehow involved burning out a ground and now feedback in one subset of the circuit is knocking out the ignition and/or fuel injection. If one of the pros who drop in here has access to their wiring schematics tonight hopefully they will post it.