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| 1999 to 2003 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped Super Duty and Excursion |
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LinkBack | Thread Tools | Display Modes |
03-16-2011, 06:32 AM
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Emergency truck died
Ok my battery light started blinking. thought it was my belt slipping. tonight my electrical started going out, first the radio then stuff on the dash went weired. i shut the truck off and it won start up again. The batterys are reading both 11.4 Its raining so i couldnt unhook and test the battery's individually. So is it my Alternator or battery?
I have no cars i wrecked my honda please help. 
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03-16-2011, 08:46 AM
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Everytime the battery light has come on on my truck I have had to end up replacing the alternator.
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Bob- 2003 F250 Lariat 7.3PSD CC SB FX4 Kwik (6637) Filter, RE 2.5" leveling kit, F350 Rear Blocks, TC Lock, Fumoto, EBPV/Exhaust Brake,6.0 Tranny Cooler, AIH Delete, IssPro EV2 Gauges, PHP Phoenix stock, 25tow, 40tow, 65tow, 80dd, 100perf, In-tank mods, Muffler Delete, WW, FRx,HPx, JW Stage 1 Trans, Swamps HV/HF IDM -Pulling a 38' Forest River Sierra 5th Wheel 
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03-16-2011, 03:26 PM
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The only thing the battery light is hooked to is the voltage regulator on the alternator.
Good call, Bob.
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03-16-2011, 04:06 PM
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Alternator for sure. Just replace it and make sure you charge the batteries before running the truck with the new alternator. If not it could cause damage with too much time charging from a dead state.
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F250 Reg Cab - 1,086.6 HP / DJ# / 11.56 Fuel Only / 10.94 Nitrous / Dyno Run 10-2009 -------------------------------------------------- Empire Diesel Performance Swamps Diesel Performance - Injectors & IDM Gearhead Automotive Performance - Stage II Cam
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03-16-2011, 07:59 PM
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X2!!! ^^^What he said^^^ An alternator is not a battery charging device. It is a battery maintaining device.
You COULD have a totally shorted battery or something that is preventing the alternator from charging them. Before you jump in and change the alternator, try charging BOTH batteries. At no load, about 3 hours after charging, they should read about 12.7V. Anything less is an indication of a weak battery. A battery charge of 11.4V is a totally dead one. When a battery gets pulled down like yours were, it is not uncommon for the battery to be bad too, in addition to a possible alternator failure. (Aren't vehicles fun?) - Jack
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 2005 F150 KR SCrew 5.4L 4x4 with PHP Gryphon CTS programmer
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03-16-2011, 08:35 PM
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ok well i have been bad and the battery light has been flashing for a couple weeks. I have a alternator im going to go pick up in an hour. Also O have a large radio with and amp so im sure the amp drained one side of the batteries. I will let you know my findings soon ty for the help.,
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03-17-2011, 05:51 AM
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I seemed to of fixed it Ty for your help :-) know if someone can help me out with one injector harness
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03-17-2011, 09:35 AM
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Quote:
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2001 F350 7.3L Crew Cab SRW short bed 4x4 3.73 automatic billet tc w/shift kit TS chip with PHP tunes (stock, 40 Tow WITH Whisper, 80 Econ, 100 Race, 140 Extreme, Smoke Show)/ transmission has been beefed up, BIG BOOST, Glow Shift gauges, Yokahama A/T 315-75-16, zoodad mod,4" MBRP straight turbo back, FPR shimmed to 65psi, CCV mod, 6637 DIY, Wicked Wheel, Ranch Hand bumper
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03-17-2011, 10:06 AM
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X2 Again! You could have one weak battery! DO test them both separately! (It would be best to have them load tested.
- Jack
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03-17-2011, 07:25 PM
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It was the alternator! Batteries are fine.
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