Battery Light On - Page 2 - Ford Powerstroke Diesel Forum
6.7 Electronics Discussion (2011-2016) 6.7 Electronics Discussion

Reply
 
LinkBack Thread Tools Display Modes
post #11 of 13 Old 09-27-2018, 12:45 PM
Powerstroke.org Rookie
 
Join Date: Dec 2017
Posts: 8
Thanks: 2
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
I had the same issue about a month ago. Battery light came on, I monitored with voltage with SCT tuner. Took it to my buddies shop he load tested and checked the alternator, no problems. Next day drove about 15 miles and all my gauges and radio unit went crazy, voltage dropped down to 11. My buddy replaced the alternator. I drove it about 50 miles and the battery light came back on and headlights flickered and voltage dropped to 12. Took it back to my buddies shop, and they took it to an electrical shop and they replaced the above mentioned faulty wire. Light gone! Driving a few days later lights still flickered when voltage dropped below 14. Replaced alternator again and all is well. Now I am having an issue with my radio/infotainment system turning itself off and clock not working. ???????

Paid about $400 to have wire replaced.
natetp1227 is offline  
Sponsored Links
Advertisement
 
post #12 of 13 Old 01-09-2019, 01:56 PM
Powerstroke.org Fanatic
 
ATCguy's Avatar
 
Join Date: Aug 2012
Location: Fulltime RVer
Posts: 110
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Well, my turn for the subject issue...

Light first noticed about a week ago during a 20 mile trip. Arrived destination, completed a few tasks, restarted the truck about 45 mins later, no light on the return trip. Figured it was just a hiccup in the system. Then day before yesterday, the light came back on as I was finishing a drive back home for the day. Started the truck the next day... no light when the engine started, but as soon as I put it in gear, the light returned.

Called the local shop, who agreed to try to fit me in during the late afternoon yesterday. Drove over, and the tech went to work. After about 2 hours, came in shaking his head. Said both batteries tested good, as did both alternators. Good voltage out of the alts, and good voltage into the batts. Tested the big fuse block on the firewall, stated that was good as well. Reported seeing a different code than in post #4 above. My code was P-0620, which is “Alternator control circuit – malfunction”. He determined issue had to be something between the PCM & connectors... possibly a chafed wire, possibly a bad connector, or even PCM going bad. Unfortunately, closing time was approaching... and to determine what would require me bringing the truck back in a leaving it next week when they could schedule me on the calendar, as this would take a couple of hours of labor to handle the issue. He also provided me a schematic showing where he theorizes the problem may be... which I've included in the attached file.

So, since the truck starts up fine each time, and otherwise seems to run ok (except I have noticed it seems to be idling higher than normal)... I figure I;'m good to go until they can get me back in the shop next Wednesday, and we'll see how it goes. I've bookmarked this thread and will show it to them when I return... maybe it'll help speed things along.

Will come back to update then...
Attached Thumbnails
Click image for larger version

Name:	tech.jpg
Views:	178
Size:	2.82 MB
ID:	713069  
ATCguy is offline  
post #13 of 13 Old 08-10-2019, 12:31 PM
Powerstroke.org Rookie
 
Join Date: Feb 2018
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Any news on this?

Jay
midipuppies is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in













Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome