99 & up 7.3L Power Stroke Engine and DrivetrainDiscussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
Probably telliing you it won't start after work today. Usually when the battery light comes on that means the alternator is not working. Once the voltage drops to a set amount the battery light will come on.
Here is the description of how the light turns off after start-up:
When the generator builds up enough voltage to energize the voltage regulator, voltage is applied to the PCM. The PCM upon receipt of the generator charging voltage, removes the ground to the instrument cluster and turns off the charging system indicator.
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Ken
2002 F-350 CCLB 4X4, HD4R100 , Riffraff FRx, Riffraff CAC Boots & PRI's, Bellowed Up-Pipes, 4" Diamond Eye exhaust, Powerslot rotors, ATS Ported Compressor Housing, DP Tuner-F6, Autoenginuity, EEC-V Breakout Box, KCM S.S. HPX Line, S&B Filters intake, Quad Autometer gauge pod, Inovations canopy, Banks Big Head wastegate actuator, 6.0L Trans Cooler, Spin-on Transmission filter with custom bracket, Zoo-dad, Dieselsite Coolant Filter, Cobra 29LTD/NW CB, DVD and always looking to do more....
the one on the passenger side is closest to the starter. But my truck had the battery light on for forever and nothing ever seemed wrong but after about 50,000 or more miles i went ahead and changed it just to take the light away because i was tired of looking at it. Go to NAPA and get one of their heavy duty alts, that way you can bring your core in and knock a little off the price. always a good thing!
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early 1999, 7/98, F-250 7.3L, 250,000+ miles, 4x4, triple disk torque convertor, AFE dryflo home made cold air intake, straight pipe exhaust, superchips tuner (stuck on high performance tune,because someone stole the tuner out of my truck), 4.7K mod, Glow shift gauges (pyro, boost, egt), CCV mod, 3in of lift in front, 1in in back w/ 2009 SD rims w/ 2in wheel spacers wrapped in 325/65/18 Fierce Attitude MT, aftermarket headlamps w/ LED's, ranchhand grill guard, 03' front bumper w/ fog lights, gooseneck hitch
ditto, I have the same year, same light, and 3 days later the truck was dead, it was the alternator. I bought one at NAPA, I think around $125 with the lifetime warranty, and have changed it twice since then about every 2-3 yrs, free except for my labor which isn't much because it's a 10 minute job to change. The NAPA guy told me it's a design problem that they put out too much current without enough cooling...get the lifetime warranty and change it whenever the light comes on.
I bought one at NAPA, I think around $125 with the lifetime warranty
I bought one from NAPA a couple months ago. They didn't even have a "lifetime warranty" option for any of their alternators. Their regular alternator was a 1-year warranty, and their heavy duty was a two-year.
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2001 F-350 Crew Cab XLT PSD 4x4, Long Bed, 6-speed, 3.73, Manual Transfer, Power TTT Mirrors, 122k miles.
1989 Toyota 4x4 xtracab SR5 V6, Beat to heck with 200k+ miles and still running strong.
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