Battery Indicator won't go off

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Oct 19, 2019 | 12:49 PM

larryrawls

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Battery Indicator won't go off

I recently had a problem with my batteries/alternator/power cable to alternator.
ABS light came on (and OCDB tester definately flagged a power/battey issue)
Ran tests on batteries and on battery cables.
Ended up replacing the alternator, and 2 battery cables (due to high resistance).

Got everything in, charged batteries, and started engine. At this point, the Battery Indicator light came on.
Put a OCBD tester on and
ran diags. Only error code was for fuel injectors. Batterys both were over 12.8 setting and 14.4 with engine ruuning.

How do I reset the battery indicator light? Or is there something I am missing..

Thanks..

Oct 19, 2019 | 03:51 PM

Visurveyor

Fleet Mechanic

Joined: Jul 2018

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From: Jacksonville Florida

First question is what are you reading Dtc's with.
Most that I know of give you an option to delete Dtc's. Look in to program to see how to delete Dtc's.
Once you delete them and that particular one pops back up means you still have an issue.

Oct 19, 2019 | 10:21 PM

larryrawls

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Error isn't a DTC per say..The error is the dash-board battery indicator light won't go off... ODBC Reader not showing any battery faults... Is there a way to reset the monitor status on this? I have driven the truck for 30 minutes or so... Is there a fuse that may need to be replace? I have had alternator/batteries die before (on my 7.3) and the dash light always reset
it-self... Thanks

Oct 19, 2019 | 10:33 PM

m-chan68

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Joined: Mar 2010

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From: Woodbridge, Ontario, CA

What is the model year of what we're working on? Also, is this a dual alternator or single alternator application?

Oct 19, 2019 | 10:59 PM

larryrawls

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My apologies... Should have included more base info. Here it is:

2005 Crew Cab 4wheel drive 6.0 single alt.... Currently 223K miles on unit.

Truck is running good with only errors currently showing on DTC Tester being:

These have been showing up for over 6 months... Initially was told that this could be normal for a older vechicle due to age and wear (was I informed incorrectly?)

Cylinder x Glow Plug Circuit Faults P0672

Glow Plug Control Module Circuit Fault P0670

Encounered a new msg today on Fuel Level Sensor 'A' Circuit P0460

Again, Thanks for your input

Oct 20, 2019 | 09:48 AM

npccpartsman

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Joined: Dec 2003

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From: Stuttgart, Ar

Glow plug control module code (P0670) and cylinder #2 (P0672). Not totally sure as it might be a circuit, but your GPCM is probably gone. Check both plug-ins and ohm the #2 circuit. AFA the battery light, it's usually one of the wires where the plug goes into the alternator that gets broken (I-sense wire).

Oct 21, 2019 | 09:48 PM

m-chan68

Lead Driver

Joined: Mar 2010

Posts: 5,505

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From: Woodbridge, Ontario, CA

You need to check for continuity between the light green with red striped wire (circuit 904) between pin #1 of the alternator connector, and pin #15 of the connector to your instrument cluster. That is the wire responsible for shutting off the battery indicator light when charging system voltage is sensed, as appears to be the case described. That wire goes through the main engine harness, and then through the engine compartment before finally making it through the interior harness. There are a few inline connections in between, so checking through those connections in steps should lead you to the source of your open circuit eventually.