Battery Light On - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 10-10-2010, 05:30 AM Thread Starter
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Battery Light On

Hi, I've been through the battery light issue before but it is usually alternator/battery issue. Both batteries load test ok as well as the alternator. The light does not flicker at all it is on solid all the time: when running and with the key on with truck off. I was driving down the road and all the sudden the radio turns off, the battery light comes on then the radio fires back up. The only other thing I have noticed is the truck acts different when starting. I'm confused....need help.

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Luke

Early 1999 F250
Levelled, 6637 Intake, Straight 4" Turbo Back to 5" Stacks, John Wood Valve Body, PHP Tunes, 33' Terra Grapplers....
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post #2 of 9 Old 10-10-2010, 05:35 AM
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When you are load testing the batteries are you totally disconnecting them or are you leaving them hooked up?

Email: Dave@powerstroke.org
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post #3 of 9 Old 10-10-2010, 05:48 AM Thread Starter
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Yes, completely isolating each battery.

Early 1999 F250
Levelled, 6637 Intake, Straight 4" Turbo Back to 5" Stacks, John Wood Valve Body, PHP Tunes, 33' Terra Grapplers....
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post #4 of 9 Old 10-10-2010, 05:53 AM
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Have you tested your starter by chance?

One or two of those items is bad. Just have to narrow it down

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #5 of 9 Old 10-11-2010, 05:24 PM Thread Starter
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Update:

So my alternator and batteries load tested fine., but the light was on...unsettling. I was driving yesterday and all the sudden the motor was heavilly loaded and the voltage gage went to 0. My alternator kicked the bucket...or did it? So I ran to Autozone, actually convinced one of the guys who worked there to meet me on the side of the road with a new alternator. I proceeded to install. Once I got it in I fired up the truck (using a booster pack) and I instantly noticed the battery light was still on. I tested the alternator output lug and got zero volts. At the time I just thought I was sold a defective alternator not thinking I should atleast see system voltage on the lug. I realized that the alternator circuit was open and then thought fuseable link. I traced the alternator wire back toward the starter relay to find a mess of burned/bare wire. The black and orange alternator wire splits into to smaller brown wires that connect to the strter solenoid. Is this the fuseable link on this truck? I'm not sure. How should I fix it? Just splice in the same size wire after it splits or go o ford and replace the whole cable?

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Early 1999 F250
Levelled, 6637 Intake, Straight 4" Turbo Back to 5" Stacks, John Wood Valve Body, PHP Tunes, 33' Terra Grapplers....
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post #6 of 9 Old 10-11-2010, 05:29 PM
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It doesn't sound like a fusible link . Just make a repair , make sure to use a piece of shrink wrap tube to seal it .

07 F-250 Outlaw , Rough Country 6 inch lift , 37-13.5 R20 Nitto Mud Grapplers , MBRP 5" Exhaust , 08 Mirrors , S&B intake , 5% Tint sides and back , 35% windshield .

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post #7 of 9 Old 10-11-2010, 05:51 PM Thread Starter
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Right that's the way I'm leaning too. I don't know if the alternator was the root cause or if the wire wore the shielding enough to short. I need to get it tested. The only reason I'm thinking link is that the wiring diagram shows a 175A link on the black and orange wire that I'm not seeing it. I will put a bandaid on it and try it out.

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Early 1999 F250
Levelled, 6637 Intake, Straight 4" Turbo Back to 5" Stacks, John Wood Valve Body, PHP Tunes, 33' Terra Grapplers....
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post #8 of 9 Old 10-11-2010, 06:01 PM
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On mine the link is right by the alternator .

07 F-250 Outlaw , Rough Country 6 inch lift , 37-13.5 R20 Nitto Mud Grapplers , MBRP 5" Exhaust , 08 Mirrors , S&B intake , 5% Tint sides and back , 35% windshield .

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post #9 of 9 Old 06-03-2011, 06:39 AM
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i know this sounds crazy try checking fuses i had the same problem
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