Volvo RWD 700 Forum

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low voltage ?? 700

posted by  someone claiming to be daylan on  Mon Jul 21 15:17 CST 2003 [RELATED]

Is it typical that the volt meter on my instrumentation panel usually runs in the lower half (less than 14 volts)? I know that the alternator applies a charge voltage of 14+ volts, but do the volt meters on the dash tend to read low?

With the lights on at night it even runs closer to 11-12 volts.

What sort of effect does a low battery/dodgy alternator have on the performance of a 740 turbo? Where and when will would you feel the effect the most? accelerating? cruising?

I have yet to get the time to replace the cable clamps. They are both somewhat corroded and the wires going into the positive clamp are looking sketchy....I plan on cutting them back a little.

Thanks







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    low voltage ?? 700

    posted by  spasske on  Tue Jul 22 02:36 CST 2003
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    last visit: Thu Oct 23 10:11 CST 2014
    [RELATED]

    The voltage with the car running and lightly loaded (no lights/AC/Heaters etc.) should be around 14 volts. Once you start putting a load on that value will drop. It should not drop below 12V, though.

    Your best bet is to check/clean the cables. Corrosion and poor connection will result in a voltage drop across those connections.
    --
    Paul NW Indiana '89 740 Turbo 103,000








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    low voltage ?? 700

    posted by  jmars on  Mon Jul 21 15:53 CST 2003
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    last visit: Wed Jan 2 02:18 CST 2008
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    The 700 voltage regulator (on the back of the alternator) is non adjustible and usually set very low. Mine was set about 13volts. You can get an adjustable one here:http://www.linkline.com/personal/dbarton/. Readjust your voltage to 14-14.5 volts and your troubles will be cured. By the way I also reccommend the calibrated boost guage dial. Turns out that the stock boost guage really is accurate just uncalibrated.








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    low voltage ?? 700

    uid 8728's pic
    posted by  Morpheus on  Mon Jul 21 15:44 CST 2003
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    i have the same problem.When i start the car it goes up to 14 but as i drive it slowly goes down to 12 and then it stays there.I think its the voltage regulator thats not working properly in my case
    --
    Costa,740 tic 90' 420000kms







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