Alternator issues
#1
Alternator issues
Charge light is on, truck shuts down as soon as the battery's disconnected...something's gone bonk in the alternator. However, it's not the brushes (my first guess and hope). I can't find my multimeter so I can't positively say they conduct, but there's plenty of material and the springs work. What's the voltage regulator? Is it the "IC regulator" in the FSM diagram? How do I test it, and what else should I test before throwing in the towel and just getting a whole new alt?
This is a Bosch alternator on an 86 2WD 22R truck.
This is a Bosch alternator on an 86 2WD 22R truck.
Last edited by moroza; 11-19-2008 at 08:16 PM.
#2
Registered User
I would just get a new one. But if you want to take the time look it up in the manual.. What year is your truck? I'll give you the right link once you respond back.
Found them
https://www.yotatech.com/forums/f128...-years-156128/
Found them
https://www.yotatech.com/forums/f128...-years-156128/
Last edited by PDX_1ton; 11-19-2008 at 08:24 PM.
#5
Taken, tested, failed on all three counts, got a brand new (supposedly not reman) one.
Took it home, installed, fired up, disconnected the battery and engine ground to a halt. It *is* supposed to run without the battery, correct?
Ground lead and plug in the back both connected, belt is reasonably tight.
Suggestions?
Took it home, installed, fired up, disconnected the battery and engine ground to a halt. It *is* supposed to run without the battery, correct?
Ground lead and plug in the back both connected, belt is reasonably tight.
Suggestions?
#6
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Join Date: Dec 2007
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Taken, tested, failed on all three counts, got a brand new (supposedly not reman) one.
Took it home, installed, fired up, disconnected the battery and engine ground to a halt. It *is* supposed to run without the battery, correct?
Ground lead and plug in the back both connected, belt is reasonably tight.
Suggestions?
Took it home, installed, fired up, disconnected the battery and engine ground to a halt. It *is* supposed to run without the battery, correct?
Ground lead and plug in the back both connected, belt is reasonably tight.
Suggestions?
#7
The battery indeed ran down, but it was replaced two days ago and the new one seems to have plenty of juice left - engine cranks at normal speed and fires up just fine, the lights work, aso. When I fired up the truck, the charge light stayed on, and when I disconnected the battery, the engine died.
I'm going to dig up my multimeter, or get a new one, but is there anything I should test first? Fusible link somewhere?
Thanks for your help!
I'm going to dig up my multimeter, or get a new one, but is there anything I should test first? Fusible link somewhere?
Thanks for your help!
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#9
Registered User
The regulator is built inside the alternator, "ic regulator" first question....
When you get your multimeter going.... static voltage across the terminals should be about 12.5vdc with the engine running, it should be about 13.8v give or take a few tenths... if that's the case, you're fine.
When you get your multimeter going.... static voltage across the terminals should be about 12.5vdc with the engine running, it should be about 13.8v give or take a few tenths... if that's the case, you're fine.
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