alternator question - Diesel Forum - TheDieselStop.com
7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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post #1 of 8 (permalink) Old 03-13-2019, 10:36 PM Thread Starter
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alternator question

so replacing the alternator i was thinking since i have emergency lights and a few more then most lights, would i be able to put a bigger one that puts out more amps or would that just mess things up? my truck does not have ambulance package.

90 f350 2wd 7.3idi non T 5speed
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post #2 of 8 (permalink) Old 03-13-2019, 11:20 PM
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Originally Posted by DevilDog6154 View Post
so replacing the alternator i was thinking since i have emergency lights and a few more then most lights, would i be able to put a bigger one that puts out more amps or would that just mess things up? my truck does not have ambulance package.
Check your previous post about fire and wiring issue. I posted detailed info there about alternator and wiring and starter.

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post #3 of 8 (permalink) Old 03-14-2019, 04:39 PM
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Go find a shop where they actually build alternators and starters. Not some place that orders them from somewhere and resells them - the kind of place where old guys in the back tear them apart and rebuild them. Then tell them what you have and ask what they've got. Buying new throw away alternators is a mug's game.
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post #4 of 8 (permalink) Old 03-14-2019, 06:09 PM
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Trusted local shop will be your best bet or online for starter, alternator.

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post #5 of 8 (permalink) Old 03-14-2019, 10:19 PM
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Uuuuhhh... Anyway, back to the TOPIC:
Quote:
Originally Posted by DevilDog6154 View Post
...would i be able to put a bigger one that puts out more amps or would that just mess things up?
Regardless how many lights or accessories the truck has, or what prep package it has: any alternator can be installed. 60A, 95A, 130A, 250A... In place of, OR in addition to any other alternator. Assuming the new alternator works properly & is wired properly: the voltage regulator will only cause it to put out what the truck needs at any moment. If it needs everything the alternator can do, that's what the VR will aim for. If it needs nothing, the VR will essentially "turn off" the alternator. If it needs something in between, the VR will regulate that. Whether there's one alternator or 5; each will operate independently of the others, but only supply what the others aren't supplying. All alternators of all years & makes work essentially the same, and can be swapped (as long as they're each installed & wired the way they were designed to be). But the Ford 3G (third generation; used from ~'93~03) is among the most-reliable ever, and is a popular swap on older Fords and many other makes.


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post #6 of 8 (permalink) Old 03-14-2019, 11:00 PM
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Quote:
Originally Posted by Steve83 View Post
Uuuuhhh... Anyway, back to the TOPIC:Regardless how many lights or accessories the truck has, or what prep package it has: any alternator can be installed. 60A, 95A, 130A, 250A... In place of, OR in addition to any other alternator. Assuming the new alternator works properly & is wired properly: the voltage regulator will only cause it to put out what the truck needs at any moment. If it needs everything the alternator can do, that's what the VR will aim for. If it needs nothing, the VR will essentially "turn off" the alternator. If it needs something in between, the VR will regulate that. Whether there's one alternator or 5; each will operate independently of the others, but only supply what the others aren't supplying. All alternators of all years & makes work essentially the same, and can be swapped (as long as they're each installed & wired the way they were designed to be). But the Ford 3G (third generation; used from ~'93~03) is among the most-reliable ever, and is a popular swap on older Fords and many other makes.





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YA nailed it & helped me too. I'm dealing with my own troubleshooting issue. Thanks

Last edited by 8gitmusik1; 03-15-2019 at 07:47 AM.
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post #7 of 8 (permalink) Old 03-15-2019, 02:54 AM
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Just be sure if you upgrade the alternator that you also upgrade the wiring, because the stock wiring may not be adequate to handle the extra amps and may overheat and burn up.
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2001 F350 XLT 4X4 crew cab, dual rear wheels, long bed, black, 7.3l turbo diesel, automatic transmission, 4.10, shift on the fly, running boards, sliding rear window, 38 gal fuel tank, Odyssey extreme 65-PC1750T batteries, Michelin LTX-MS2 rear tires, Sumitomo Encounter front tires, Shell Rotella Ultra elc, 11,500 gvwr, 20,000 gcwr, 7500 gvw, completely stock, 114,000 miles when purchased, now has 250,000 miles, repairs so far: two starters, batteries, cps, brakes, tires, alternator, ball joints, locking hub, wheel hub, AC compressor, serpentine belt, power steering pump, driver's side window, ignition switch, o-ring, Spectra premium radiator, water pump, fan clutch, fan blades, thermostat, thermostat housing, tensioner. Stolen twice so far, but recovered both times with major damage.

2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.
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post #8 of 8 (permalink) Old 03-15-2019, 10:55 PM Thread Starter
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thank you.

90 f350 2wd 7.3idi non T 5speed
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