Question about 1999 Volvo S80

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Alternator on a 2.5 s80 volvo

Hi there, my alternator is either providing tok much or not enough power. How come? What should I check? Thank you? I also get a message "engine system service urgent" but the cat works fine... Is it anyhow related? Thanks in advance for your help.

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  • Expert
  • 85 Answers

Check resistance on the main positive cable. could be a bad cable or connection at the starter.

Posted on Feb 17, 2014

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Posted on Jan 02, 2017

glennsmart
  • 798 Answers

SOURCE: 1999 Volvo S80 will not hold a charge

Tricky ... Was the alternator replaced with a 2nd hand one or a new one?

A defective alternator can allow the battery to discharge within a few minutes (the diodes in the rear of the alternator can burn out and cause the problem. The diode pack can be replaced). When this happens recharging the battery only replaces the power in the battery - which drains straight back to earth via the alternator, flattening the battery again - often within a couple of minutes or less.

Does the battery lose its charge when the car is standing or just when the engine is fired up?
If the battery loses its charge overnight, try disconnecting the wiring from the rear of the alternator (also look at the electrical connector that fits into the back of the alternator - look for melting/burning marks which suggest something may be amiss inside the alternator).

Let the car stand overnight with the alternator wires disconnected. Will it start up ok and drive (with the alternator wires still disconnected) the next morning?

You could also try just disconnecting the alternator wires, firing up the car and then driving it -
If the car drives ok without dying out and gets further down the street than it usually does, then it probably is the alternator at fault. The car should drive until the battery drains and has insufficient power to trigger the ignition. You certainly would get further down the street with a charged battery and disconnected alternator than you currently do.

It does sound as though you've had an alternator fault to begin with. If it has been replaced with a 2nd hand unit that unit may also be faulty. Rather than replace parts in desperation, visit an auto electrician's - within a few minutes they will be able to test the battery/alternator output and also identify where the lost current is going. It will be cheaper in the long run to have an auto electrician look at the charging system. It only takes a few minutes.

Posted on Sep 17, 2008

  • 19 Answers

SOURCE: "SRS - AIRBAG SERVICE URGENT"...message

If you have SRS and "brake failure" it should be taken to a dealer. a shadetree mechanic will screw more up than he will fix in this case. trust me on this! you will pay a price, but will save you more $ and less headache in the longrun.

Posted on May 09, 2009

Murphybanton
  • 2004 Answers

SOURCE: service engine message on message center

The fuel pump which is located in the fuel tank beneath the back seat has gotten bad. Consider replacing it.

Cheers and rate this solution.

Posted on Sep 05, 2009

kirkx
  • 2019 Answers

SOURCE: how do i remove the alternator from a volvo s80

First remove the battery cable.
Then it depends on how easily you can get at the wiring at the back.
If easy, then take a picture of the big power wire held with a nut (13mm), small wire that plugs in, and small ground wire on small nut (8mm).
Remove them.
The loosen the adjustment bolt, remove the belt, and remove the pivot bolt.
If the wiring is too hard to get at, then do it after the alternator is loose.

Posted on Mar 17, 2010

dannybuonomo
  • 36 Answers

SOURCE: 2001 Volvo S80 T6 "Engine System Service Required"

Hold down the odometer reset button, turn the ignition key to position 1 for 1-2 sec. Then, turn the key to position 2 still holding the button down. Wait for the service light to flash and release the button. It can be tricky. It may take a few times to get it.

Posted on Sep 02, 2010

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1 Answer

How do i remove the alternator from a volvo s80


First remove the battery cable.
Then it depends on how easily you can get at the wiring at the back.
If easy, then take a picture of the big power wire held with a nut (13mm), small wire that plugs in, and small ground wire on small nut (8mm).
Remove them.
The loosen the adjustment bolt, remove the belt, and remove the pivot bolt.
If the wiring is too hard to get at, then do it after the alternator is loose.

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remove power steeering pump, bolts through pulley wheel then alternotor is easy to get at

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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

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Apr 12, 2009 | 2000 Volvo S80

1 Answer

1999 Volvo S80 will not hold a charge


Tricky ... Was the alternator replaced with a 2nd hand one or a new one?

A defective alternator can allow the battery to discharge within a few minutes (the diodes in the rear of the alternator can burn out and cause the problem. The diode pack can be replaced). When this happens recharging the battery only replaces the power in the battery - which drains straight back to earth via the alternator, flattening the battery again - often within a couple of minutes or less.

Does the battery lose its charge when the car is standing or just when the engine is fired up?
If the battery loses its charge overnight, try disconnecting the wiring from the rear of the alternator (also look at the electrical connector that fits into the back of the alternator - look for melting/burning marks which suggest something may be amiss inside the alternator).

Let the car stand overnight with the alternator wires disconnected. Will it start up ok and drive (with the alternator wires still disconnected) the next morning?

You could also try just disconnecting the alternator wires, firing up the car and then driving it -
If the car drives ok without dying out and gets further down the street than it usually does, then it probably is the alternator at fault. The car should drive until the battery drains and has insufficient power to trigger the ignition. You certainly would get further down the street with a charged battery and disconnected alternator than you currently do.

It does sound as though you've had an alternator fault to begin with. If it has been replaced with a 2nd hand unit that unit may also be faulty. Rather than replace parts in desperation, visit an auto electrician's - within a few minutes they will be able to test the battery/alternator output and also identify where the lost current is going. It will be cheaper in the long run to have an auto electrician look at the charging system. It only takes a few minutes.

Sep 14, 2008 | 1999 Volvo S80

1 Answer

No mechanics in town to help


change your alternator out this is the first indicator of worn alternator or a bad replaced alternator
all warning lights means that alternator is not putting out power and vehicle will run ruff with low power since everything is controled by the power of the alternator
since your in alaska i recomend a new alternator not a replacement refurbished these dont tend to weery the weather very well up there and make sure when you order your alternator that you want to make sure its not a refurbish and that it can take the elements you might need a 16 volt alternator

May 16, 2008 | 2000 Volvo S80

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