Question about 1998 Volvo V70

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My volvo s70 is not charging, no volts coming from the alternator, could this just be the voltage regulator, or do i need to replace the alternator?

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I'm not real familiar with Volvo but all other cars I have worked on has the regulator integral with the alternator.

Posted on Jul 01, 2009


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Volvo 240 alternator repair

When the Bosch alternator in your Volvo 240 series fails there is a high probability that it can be easily repaired.These alternators use an"externally mounted internal regulator." This small assembly which consists of a solid state 14.4 volt semiconductor and a pair of brushes regulates the output current going to the battery. The brushes will wear down, effectively disconnecting the regulator. When if fails, and it eventually will, the output voltage drops from 13.8-14.4 volts DC to slightly less that the voltage of the battery with the engine off. Remove the two screws that attach the regulator to the rear of the alternator, remove, and check the brushes. if they're worn, replace either the brushes or best is to locate a self serve parts yard and get a better used regulator. Install it and you should be ok.Time to remove, examine, and reinstall the regulator assembly should be 20 minutes or less.

on Jan 06, 2010 | Volvo 240 Cars & Trucks

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" HI " Where is the Voltage Regulator Located on a 2002 Dodge Stratus R/T 3.0

The way to check for an over or under charge is to connect your volt meter to the battery, before starting the vehicle.
You should have a reading of 12.5 to 13 volts. If it's 11.8 like you stated or less, it means battery is not fully charged, or it's bad. Now start the car & check voltage again while running the engine, the voltage should exceed 14+ volts, this means your Alternator is charging, the voltage should drop after battery has been charging for awhile. When you turn the engine off after letting it charge the battery, & if the battery is good, you should now have 12.5 volts to 13 volts.
Now to answer your question, the Voltage Regulator is inside of the Altenator, I believe you xcan take the alternator apart to replace it, or simpler to just replace the complete alternator.

Nov 15, 2014 | 2002 Dodge Stratus

2 Answers

Ammeter reads 18V with engine running.

I'm assuming you mean the charging voltage indicator. This is an indication of an incorrect charging voltage (too high, should be from 12.5 to 14 volts). This problem is most likely caused by a bad charging voltage regulator. There are two variations of the location of the regulator: 1) regulator is outside of the alternator and located on right side of the engine compartment on the wheel-well, below the starter relay or 2) The regulator is inside the alternator (in which case you'd have to replace the alternator).

Sep 01, 2011 | 1993 Ford F350

1 Answer

1990 240 dl Volvo wagon, have to put fully charged battery, then when the battery is discharges the car dies, alternator ? Voltage regulator ?

sounds as though you have a bad alternator or a loose alternator belt and the battery is not being charged. while the car is running - check the voltage from the alternator and make sure it is about 13.4 volts DC.


Jan 03, 2011 | 1990 Volvo 240

2 Answers


The light will come on if the system is over charging. No system I know of charges at 18 volts. That is way too much. You need to have the alternator checked out. Most system charge at 14.5 to 15 volts at the most. You will burn out something major if not fixed. you can go by most auto part stores and they will check it out for free.

Dec 29, 2010 | 1984 Oldsmobile Cutlass

1 Answer

98 s-70 volvo will not hold charge. new battery

Check your regulator in the engine bay. Good?

Mar 30, 2010 | 1998 Volvo S70

4 Answers

My low voltage light came on in my 2002 volvo s80. I just replaced the battery. Is is something else than the battery?

the alternator. have it tested as if it iis failing the car will run off of whatever voltage is left in the battery until it is consumed as the alternator is supposed to recharge the battery and supply the power for the cars components

Sep 23, 2009 | 2002 Volvo S80

1 Answer

Battery Light is On

The alternator is not charging the battery. Could be alternator, voltage regulator (which is usually in the alternator) , dirty/loose connections. First I would inspect all relevant electrical connections, clean & tighten. If no change -- replace alternator.

But be sure to fully charge the battery before you run the new alternator (follow alternator installation instructions).

May 13, 2009 | 2000 Volvo S70

1 Answer

Charging problem 1991 volvo 240

14.6 means your voltage regulator or diode is suspect Despite having new alternator .Ive cross refrenced your smptoms in the haynes workshop manual and alternator is your only end answer.The haynes test is to start vehicle with multi meter connected across the battery terminals,increase the engine speed until the reading remains steady should be approximately 12 to 13v and no more than 14v.switch on as many accessories as possible(headlights heater blower radio etc)check that the alternator maintains the regulated voltage at around 13 to 14v.If the regulated voltage is not as stated then alternator is to be repaired/replaced.Good luck with it and a happy new year.

Dec 29, 2008 | 1991 Volvo 240

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