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> Checking, Alternator, Battery and Drain
post Oct 28 2008, 01:32 AM
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QUOTE(Volgrrr @ Oct 28 2008, 02:06 PM)
It points to either a faulty alternator, a faulty battery or a rogue current drain on the battery, and all of these problems are easy to identify.

Rogue current drain check.
Switch ignition off and remove cables from the battery positive pole, switch a multimeter to D.C amps and connect the meter between the removed cables and the positive pole of the battery (make sure the meter is switched to the highest amps range) and check for current flow that might be draining the battery (if there is current flow - I'd check to see if the glove-box light is being switched off).

Alternator check.
At night, with the engine off, turn on headlights and any other device that uses current that you can think of (e.g fan motor, foot on brake pedal etc.) then start the motor and see if there is any noticeable difference in the brightness of the lights (there should be). Now, with the engine running, with a meter switched to D.C volts, check the voltage across the battery poles which, if the alternator is in good nick, should indicate somewhere around 13.7 - 14 volts.

Battery check
With the motor stopped, place a D.C voltmeter across the poles of the battery. The voltmeter should indicate around 12.6 volts - if it is any less then the battery is most likely on it's way out. A battery that reads as low as 12.0 volts has faulty cells and is, for normal day-to-day use, dead.

Good luck!

Good tips!
Hard to find, indeed.

Thanks to Volgrrr...

:right: :right: :right:
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post Oct 14 2009, 08:36 PM
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post Jul 20 2010, 06:17 PM
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if you need parts, please check out iPartCars.com...WE DO SHIP!!!

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post Aug 30 2010, 03:45 AM
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Hello Everyone,We see this often. It’s a good question, one that many normally-aspirated 850/V70/S70 owners ask here. It gets philosophical pretty quickly, but one thing is for certain: it’s not worth the costs and time involved to convert. It’s far easier and less expensive to sell your N/A and buy a Turbo.air conditioner service

But if you’re not going to do that, here’s what you can do to make your N/A as fast as you can for a reasonable amount of time and money.
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post Jun 2 2015, 01:50 AM
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Greetings from N.Cal newbie! My 850 turbo and I are honored to be able to share and exchange ..ideas... here. I acquired this fine auto 'bout one year ago, having a a tad trouble w/ electrical. Actually the car just died on my while driving home.! The battery was so low... the suspected culprit is the glove box light I'll discover soon. I did notice that previous owner had recently installed a smaller than battery plate allowed battery. ok, so a larger one will be going in.. but may I add that there was trouble earlier. The car started making a grinding sound one day like what the for?? current wasn't flowing right. After looking at a volvo mechanics ideas about this, and me throwing out all I could think of cause, moisture came to mind and it turned out to be the cause of battery drain. I live in the coastal mtns..I can smell the ocean.. the night air is so thick that if not covered at night , eventually will drain battery. Alot of driving is on country dirt roads . I try to be careful... I fear for auto tranny...brakes. My other car is a 1995 Jeep laredo--gets 'er done...but I love my Volvo for streets and highways. tuvok2 bids adieu
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