That's no good... Just saying. My 07 will sit for months without being touched now that my 17 is on the road. I get in and it will fire right up without any issues/lights etc. That's at 215k on the clock too.
battery warning light
- Thread starter Zellerj
- Start date
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Zellerj
Member
Below is a picture of my load tester.
Update: I hooked my battery to an external charger and started the car. After a minute or two the battery light came on. Previously I had said that the light stayed off, but I guess I did not run the truck long enough for it to come on.
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Check the terminal for the small wire on the positive post of the battery. That wire leads to the fuse panel, and a loose connection can cause the computer to read that as a weak battery.
I recently had a similar problem with my '15 Expedition. The light came on intermittently. Voltage always looked good, both while running and off. I had the battery and charging system checked, and everything tested fine. One day, the light came on before I left the driveway, so I decided to check it out. When I opened the hood, I could see a few melted spots and a small amount of smoke coming from the red rubber terminal cover for the battery. That small wire terminal was blazing hot. I traced the wire to the fuse panel. Once it cooled, I could turn the nut with just my fingers. I tightened the nut, and haven't had a battery light since.
I recently had a similar problem with my '15 Expedition. The light came on intermittently. Voltage always looked good, both while running and off. I had the battery and charging system checked, and everything tested fine. One day, the light came on before I left the driveway, so I decided to check it out. When I opened the hood, I could see a few melted spots and a small amount of smoke coming from the red rubber terminal cover for the battery. That small wire terminal was blazing hot. I traced the wire to the fuse panel. Once it cooled, I could turn the nut with just my fingers. I tightened the nut, and haven't had a battery light since.
Zellerj
Member
Thanks for the suggestion, but those wire connections, and the negative / ground connections are tight and clean.
I have a date with the Port Clinton, Ohio Ford dealership on Wednesday to reflash the PCM because of a warranty issue with the output speed sensor. Perhaps that will fix my battery warning light. They will try to figure it out in any event. I will report back.
Jim
I have a date with the Port Clinton, Ohio Ford dealership on Wednesday to reflash the PCM because of a warranty issue with the output speed sensor. Perhaps that will fix my battery warning light. They will try to figure it out in any event. I will report back.
Jim
Zellerj
Member
The Port Clinton Ford dealership hooked my 2012 5.4 L expedition to their computer and saw a fault for a broken wire coming from the power distribution box. They spliced in a new wire and for $108 my light is no longer on. I could not see what wire they fixed because I was not allowed to watch the technician, When I looked at home, I found some new black tape but did not want to undo this to observe the fix. Hope this helps someone.
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