Battery light with high idle and odd shifting - Ford Powerstroke Diesel Forum
6.7 Electronics Discussion (2011-2016) 6.7 Electronics Discussion

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post #1 of 11 Old 11-26-2017, 02:42 AM Thread Starter
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Hi, new to the forum but long time creeper. I have a 2014 6.7 and the battery light has come on and is staying on. Ive tested both alternators and batteries to be good (14.5 volts and 12.5 volts respectively). To accompany the battery light I have only noticed a higher idle (750rpm vs normal 500ish) and hard shifting especially down shifts.

Not sure whats going on here. Can't seam to find any obvious wire breaks or miss connections.

Help?

Thank you in advance!

Edit:

Not sure if its related or not or if its working correctly but my auto temp doesn't seam to do much at all untill the engine thermostat opens (at least that what I think os happening). Set in auto high heat there is very little air coming out of the windshield vents. It styas that way untill my temp gauge moves a bit then the fan kicks on high and heat comes. Maybe I have an issue with my supplemental heater? Thanks!

Last edited by Neurotoxin; 11-27-2017 at 01:22 PM.
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post #2 of 11 Old 11-27-2017, 12:07 AM
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I don't have much, but did you multimeter the batteries? How old are they? It might be worth pulling them and carrying to a part store and having them load tested. I've heard they can hold voltage, but when they get called on they aren't up to snuff.

It's where I'd start.

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post #3 of 11 Old 11-27-2017, 07:36 AM Thread Starter
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Looks like this fuse block maybe my culprit. Had a look after seeing this thread: https://www.powerstroke.org/forum/gen...=2&gid=1&pid=1
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post #4 of 11 Old 11-27-2017, 07:38 AM Thread Starter
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Quote:
Originally Posted by Old King Coal View Post
I don't have much, but did you multimeter the batteries? How old are they? It might be worth pulling them and carrying to a part store and having them load tested. I've heard they can hold voltage, but when they get called on they aren't up to snuff.
It's where I'd start.

Ive tested both batteries and alternators to be good. Batteries are both only 2 years old and take load well.
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post #5 of 11 Old 11-27-2017, 07:39 AM Thread Starter
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Quite corroded and dirty
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post #6 of 11 Old 11-27-2017, 12:07 PM
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14.5 volts and 12.5 volts should be your readings, not amps.



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post #7 of 11 Old 11-27-2017, 01:23 PM Thread Starter
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14.5 volts and 12.5 volts should be your readings, not amps.
Yes, thanks
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post #8 of 11 Old 11-28-2017, 08:58 AM Thread Starter
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I changed it out and now I have my supplemental heater working again. Unfortunately the battery light is still on and my revs are still high. Leaning towards an alternator again. I'll have to rip them out of the truck now for load testing.
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post #9 of 11 Old 11-28-2017, 01:11 PM
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Keep us posted. I'm curious what you find wrong.

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post #10 of 11 Old 11-28-2017, 01:21 PM
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Sounds like corrosion or you have another issue and these symptoms are the result.

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So says the internet... ...and so it shall be.
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OK, thanks for the info. To show my ignorance, what is the problem with 3 nipples...
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