Question about 1997 Nissan 200SX

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Voltage regulator i just replaced the alt. and battery on my nissan 200sx and it still runs off the battery.you can jumo it off and it will run for about a minute and shut off.a friend said that it could be the voltage regulator.could that be the problem if so where is it located at?????

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On newer cars the regulator is located in the alt. , you probably got a bad alt. exchange it for another

Posted on Dec 04, 2008

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2 Answers

How do I replace a voltage regulator on a 1995 rodeo


which engine, ?
let me guess, battery will not hold charge, battery good.
idle at 800 rpm hot, battery voltage not 13.3 to 15vdc. so charge failure and lamp glows, charge. in dash? or not glow?

so you didnt check the 3 fuses and CB yet?
seen here.
and the charge relay? seen here,
got 12vdc on all back terms of alt?
and 0v running at blue-white wire of alt pin.
use a voltmeter and find out whats going on.
the record on this forum is 5 alternators swapped out. (all in vain)



25406995-03s3gpofdgkqnuacwmw51svl-4-0.jpg

Feb 08, 2015 | 1995 Isuzu Rodeo

1 Answer

Overchanging alternater (ECU?)


The ECU has no control on the voltage. Does your vehicle have a separate voltage regulator? If so that's your fault. A lot of alternators have the regulator built into them. The alternator needs to be put on a test rig away from the vehicle and the output tested, this will eliminate the vehicle, You could disconnect the wiring to the alternator, run three fly leads to the alternator and to a separate battery and run the engine and test the voltage on the spare battery. Wire 1: Battery neg to case of alternator Wire 2: Battery pos to + terminal on alt (the thick wire) Wire 3: Battery pos through a 5 watt bulb to the ind terminal (ignition light) 17 volt will blow another battery for sure.

Jan 07, 2014 | 2002 Hyundai Elantra GLS

1 Answer

1991 nissan maximacharging problem. Had the alt. and the voltage regulator checked at two places and they said it was fine switched out the battery. No joy. I'm starting to think maybe a fuse or r


I don't have a diagram for a 91, but a 95 model has three fuses - the big one ( 100amp or more) a 10amp fuse for the charge light and a 7.5amp for the third circuit. There is no relay in the circuit.
The normal voltage should be 12-12.5 with the engine off and 14.5 with the engine running at 1500 RPM.

Aug 08, 2012 | Nissan Maxima Cars & Trucks

2 Answers

Alternator is not charging Battery


Inspect all the wires leading from the alt to the batt. Also check your fuses.

If everything looks good replace the alt or if possible just the regulator. I would take it to your local parts store and have them test it first.

You can also check with a volt meter if you have one. With the engine running the voltage at the battery should be higher than 14v.

Jul 01, 2011 | Nissan Pickup Cars & Trucks

3 Answers

I gave a friend a jumo yesterday and my car wont start. No power at all


Is your alternator and your battery the same volts if so then it's your PCM or ECM and do remember that they do need to be program

Jul 22, 2010 | 2005 Nissan Altima

2 Answers

I have a 1976 eldorado that when you disconnect the battery when running the car stalls out I replaced the alternator and battery and after a couple of days the battery died the alternator did not keep the...


A 76, huh, let's see, I don't know if that had the regulator in there or not. It sounds like the alt died, but maybe not. It won't run without the alt. And will only last about 20 mins on a full battery. I would take the alt off and get it back to the store to have it checked. That would be the quickest way to tell, just because it is new doesn't mean it is good. Don't keep on killing the battery, it can only handle so many drains. Hope this helps.

Jun 16, 2010 | 1976 Cadillac Deville

1 Answer

2000 astro van Battery and alternater are both new and checked out to be in working order. I am only getting 12 volts charging with the motor running should be 14 to 15 volts. In desperate need of ideas of...


You may have a voltage drop in the battery feed to the Alternator through the fuse link and into the battery. Check the charge rate at the battery feed on the Alternator, it should be at least 13.8 volts, if it is, locate the fuse link and check it there on both sides of the link, if its still good, follow the cable back to the battery checking the voltage as you go. If you find that the voltage suddenly drops across a connection or the fuse link, remove and clean the connection or replace it if possible. If the voltage at the back of the Alternator is less then 13 volts, then the new Alternator may be faulty. If the voltage is higher then 15 volts, then the Battery feed to the Alternator is bad and MUST be fixed. Check these voltages with the engine running but watch out for moving parts ( fans etc). If you think the battery feed to the Alternator is bad, shut the engine down and recheck the voltage at the Alternator, it should be at least the same as it is across the battery. If there is no power to the Alt when the engine is off, start at the fuse link, checking for voltage and trace back to the alt until you lose the reading. If you get no voltage at the fuse link, track it back to the battery. The voltages at the battery and Alternator should be the same or only have a difference of half a volt, any more and you need to locate and fix the bad connection. DO NOT run the Alternator without the load of the battery for extended periods as this will damage the Alternator. The Alt needs the internal resistance of the battery to function correctly. If the voltages from the battery to the alt are correct, check the regulator wiring. If memory serves, there are two small wires to the alt which are in a small plug into the alt and one thick cable which connects to a bolt on the alt. The thick cable is the battery feed, the two small cables are the regulator feeds. One small cable operates the warning lamp in the dash cluster and the other is another battery feed which gives the regulator an indication of the charge rate AT THE BATTERY so if this one is missing the regulator will also cut out. The warning lamp wire serves as an indication to the regulator that the ignition is turned on and makes the alternator charge. This lamp should be on with ignition on but engine NOT running and should go out when you start the engine. If this lamp does not light up at all, suspect a broken or missing warning lamp connection or faulty regulator.A blown warning lamp bulb will also prevent the alt from working, this is because the bulb is fed with power and is grounded at the alt through the regulator and exciter diodes, feeding the regulator with power until the engine starts, then the alternator output essentially puts power to both sides of the diodes causing the lamp to extinguish. A diode is a one way valve for electricity and the regulator is inside the alt. If you suspect a faulty alt or regulator, remove them and have them checked by an autoelectrician. Unless you know what you are doing, DO NOT attempt to disassemble the alt as you can cause catastrophic damage and have to purchase a replacement alt. You may also void any warranty by disassembling the alt.. Undertake these tests and if you have any questions, email me here: swoop@live.com.au
Dave.

Dec 15, 2009 | 1997 Chevrolet Astro

2 Answers

My battery light indicator on dash board stays on


This is usually caused by a faulty alternator.
It stays on because the alternator is not generating sufficient voltage on the control winding to extinguish it.

Check battery terminal voltage while motor running with headlights on or blower fan running.
Terminal voltage should be approx 14.5V.
Ensure alternator and engine are properly connected to ground and the battery negative terminal.

Oct 08, 2009 | Nissan 200SX Cars & Trucks

1 Answer

1992 Nissan Pathfinder charging problems


How long did the 2nd alt. last before it died? The voltage regulator is, I believe, attached to the alternator. Have u had the voltage regulator checked?

Jan 04, 2009 | 1992 Nissan Pathfinder

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