2005 Ford Ranger Electric problems

I have a 2005 Ford Ranger Edge, About a week ago All the electronics failed at once. When I turn the key nothing happens at all, the radio wont work, the AC does not work, the car wont turn over. The only thing that happens is that the battery light turns on but is very dim, also the headlights turn on but are also very dim. I recently had the battery tested and it tested ‘good’ and is fully charged.

In the past few months I have replaced the spark plugs and wires, starter, and the ignition switch.
Any help would be appreciated I am out of ideas on what could be wrong.

Thanks in advance,

You may be looking at a bad BCM.


Have you had the alternator tested? Checked the battery cables and terminals for corrosion? That’s where I’d start.

Thanks, alternator is less than a year old, but I did not have it tested, and Ive checked all battery cables and terminals, cleaned the corrosion off and replaced the negative terminal

thanks I will look into that and replace it this week when I have time