Question about 1989 Chevrolet Astro Cargo

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Replaced the alternator 3 times still wont charge. new starter and battery. Voltage is still low. I was told to ground the field hole on the alternator it worked for a day and now it is back to not charging the system.

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Check your fusible links and all ground for corrosion where there attached

Posted on May 15, 2009

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Either the voltage regulator is shot, or you have a short somewhere else that is draining the battery. How are your battery cables? Is the ground wire clean and securely attached? How is the altenator belt? Is it tight?

Posted on May 15, 2009

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4 Answers

My alternator went out yesterday. I was told that I have a fuse and to check it first but I am unable to locate it in any of my fuse box. Does a 2005 Chevy Impala have an alternator fuse????


The red wire from starter, at the alternator, hot all the time. The orange wire at alternator, hot all the time. Use a test light on those wires, if hot, I don't think it is a fuse? Your owners manual should have the fuse layout.


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Nov 01, 2015 | Cars & Trucks

1 Answer

New battery new alternator battery still wont charge ??


91 , (is the charge lamp glowing key on, (shoe drops)?????
there are many ways to make it stop doing 13.3v to 15vdc running,
lots. ill list them all..
the 2 stated. in blue above. and.
1: bad dash lamp this lamp boot staps the field current or the alternator is born dead. so is it dead key on, , yes, BINGO.

2: bad alt ground, or starter top bolt , ground to battery bad or loose.
3: bad wires to the rear of alt. all 3.
4: bad battery cables. (or just corroded ends or conn. wrong)!!!
5: alt belt loose or missing.
6: engine hot RPM not 750 to 850 Rpm if 500 BINGO.
and more.
http://www.fixkick.com/Charging/charging.html

here is the drawing.
IS the sense wire is dead, not 12vdc.???

http://www.fixkick.com/Charging/charge89.jpg


the reg inside can shut the ALT down for.
over voltage
over current.
or if it THINKS(sic) that the batter internal resistances is too high. for ANY REASON what so ever. it will shut down
these protections prevents the ALt. from blowing expensive electronics (all of it) to kingdom come. $$$$$

its a feature.

Jul 08, 2014 | 1991 Suzuki Sidekick

1 Answer

Loss of power


stock car YJ ? , or all hacked up. (old cars get hacked)
2.5 or 4.0 liter engine? still have a real jeep alternator not upgraded?

loss of electrical power (first rule, we never need to guess.!!!)
not with a voltmeter. (tool that costs $20 )
alternator good (by what means, autozoned?) ( we can find out one car)
but low on gauge. what gauge in dash voltmeter.? sure...
i think you car has no charge lamp only the dash VM.

own an volt meter? a DMM? hand volt meter?

1: if the alternator charge lamp is stuck on driving.
2: is battery voltage at 13.3 to 15vdc with engine at 800 RPM idling
alternator belt not slipping, for sure.....???
if the battery voltage is near 12.5v and falling running that is
an Alternator system failure, note i said, system. !!!

this is first. if we get to here. we can find the real cause.
test 3:
is the charge lamp on keyon, and goes out running?
make sure the big fuse for the alternator in the engine bay fuse
box is not blown, 50amp?

I have no 95 FSM and my online source sucks for 95

Alternator dead: (alt good)
1: belt slipping . engine at 300rpm, nah.
2: fuse blown, the big one. (engine bay fuse box)
3: ;wrong alternator, there are many, most others will fail, even good ones.......
4: alternator ground bad. (end to end, to battery minus)
5: bad wiring to same. bad connections, any to battery or alt.
6: some jeeps the PCM has the field regulator, see link below.
ECU pin 20 , is field pin, it is on 95, 4.0L (engine not stated)

is the CEL lamp on, and throwing code 41 DTC?, alt, field errors?

the alt has 4 pins, battery, field,ground and voltage sense.
The reg is in the PCM. and if bad is a bad $3 transistor..
see same form for fix for that issue..

i think this is same as your. 1996 is big change year.
http://www.jeepforum.com/forum/f12/1993-wrangler-pcm-ecu-ecm-pin-out-diagram-1170004/


you can test the alt, PCM wire pulled !, by full fielding the alt.
grounding the field term, no wires on field pin of alt.
see FSM for details on that.
The PCM modulates the field pin to control charge at all times.

Dec 17, 2013 | 1995 Jeep Wrangler

1 Answer

I have a 1998 Hyundai accent that wont hold a charge I bought a new battery. alternator,and recently a starter but still doesn't charge even driving 20+ miles took it to schwabbys and they told me the...


Check the thick red wire from the alternator to the battery to make sure it is solid and the fusible link isn't blown or open. If you fail to disconnect the battery before changing the alternator you can short the wire blowing the fusible link.

If that is good, check the alternator voltage (same red wire) while the engine is running and it should be somewhere between 13.7 and 14.5 volts (depending on design) which should also appear on the battery terminals. Also check the field terminal of the alternator which should vary with the number of electrical items you have turned on in the car. The field should be between (I believe) 8 and maybe 11 or 12 volts. If it is very low or no voltage the engine control module or wiring is faulty or the ECM is not able to see the battery voltage either because of a wiring or alternator fuse issue.

Sep 03, 2013 | Hyundai Accent Cars & Trucks

1 Answer

1996 Gmc Jimmy, new battery, new alternator, alternator to starter wire ohms 0.1 but is still not charging. Just had shift seloniod B issue addressed and now this. Should I start looking a grounding...


You have a fuseable link at the battery positive terminal.Its a 5 guage.Go to the battery obviusly you will measure on the positvie side battery voltage,Move to the alternaltor there you should measure battery voltage,There is a total of three wire to the alternator, One goes to the battery which is cannected by a fusable link, The other two One is positive and goes to the PCM it should be the small red one.The other one right next to itgrey this is the field it is grounded by the PCM If the PCM doesnt ground this wire you will need a PCM. The old fashion ways still applies we use to ground the field to check that the voltage regulator is working, But in todays car PCM all does that. Your best bet ground the Field it will be marked F it cahrges replaces PCM. Or just measure your ground it it exceeds .05vlts a PCM is needed

Mar 14, 2012 | 2001 GMC Jimmy

1 Answer

Battery will not charge, first time its ever did this. rebuilt alternator new battery and new starter not to sure if new starter has anything to do with battery chargin but replaced it anyway, has good...


A bad voltage regulator could cause the problem. Assuming the alternator is working correctly. Jump the vehicle with the battery disconnected and then disconnect the jumper cables. If the vehicle dies your voltage regulator or Alternator are bad, some vehicle have separate regulators from the alternator, if it continues to run the alternator is good but the voltage regulator is probably the cause.

Aug 08, 2010 | 1984 Oldsmobile Cutlass

2 Answers

Charging gauge bouncing back and forth starts after jump


sounds like a shorted field in the alternator

Nov 07, 2009 | 1981 Ford F 150

1 Answer

Replaced alternator on 1985 Ford Bonco 4X4 302 engine, made sure the new one was tested at the store before bringing it home. Will not produce charge to battery. There are 5 posts on the back of the...


turn your vehicle on, disconnect the battery, both terminals(while truck is still on) if it dies on you, then either the alternator is bad or wiring is wrong. if it stays on, then you may have a bad battery or voltage regulator. Check the voltage on the battery before you turn it on(should be from 11.5v-12v), when you turn it on if the alternator if working properly you should have around 13v-14v.

Sep 16, 2009 | 1985 Ford Bronco

2 Answers

Battery wont charge


i had this exact same problem ... under the hood onthe left side of the firewall where your starter solenoid and fuseable links are there is a little container type thing that holds a 20 amp fuse that fuse is probably blown the little container is on the firewall right below the fuseable links

Jan 09, 2009 | 1997 Ford F150 Regular Cab

1 Answer

2002 sonata 2.4l battery dash light on. replaced alternator. Still not charging


I don't know if your car has an integrated regulator or not; some house the regulator in a section of the alternator case, others mount it remote from it. The regulator monitors the load and battery voltag,e primitively but effectively, and controls the current flowing through the field winding of the alternator to ground, changing the magnetic field intensity and consequently the voltage output of the alternator. The 'hot' end of the field is internally connected to the + output, the 'cold' end is controlled by a transistor inside the regulator which, in turn, is controlled by circuitry monitoring the system voltage.     Some alternators can be tested by sticking a wire through a specified opening, actually shorting the controlled end of the field to ground briefly, while monitoring the voltage across the battery, doing this though for seconds only. This essentially bypasses a suspected defective regulator; this causes the output voltage to rise instantly to its maximum of ~17 volts if the alternator is OK.
I don't recommend poking a wire at random into an available opening so having a service manual (Haynes-Chilton) would be nearly mandatory.

Sep 27, 2008 | Hyundai Motor 2002 Sonata

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