Wireve been replaced voltage regulator fah been replaced I think I might have something wired wrong between the voltage regulator and the fuse box . I also replaced the ignition switch the generator light is not hooked up will this cause this problem and if so how should it be wired

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32fire3

what do you mean be failing not charging or burning up did you cheack at the battery for voiltage output need more info.

dave abercrombie
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will not produce more than one volt does not charge battery only voltage present is battery volltage car dies if you disconnect battery while running

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Wayne

Here's some info on the charging system for you:

 

  • Check the Maximum Voltage of the Generator -

    1. Disconnect the generator from the regulator (both the DF and D+ wires).

    2. Use a jumper lead to connect DF to the generator frame (grounding the DF connection).

    3. Now start the engine and test the voltage between D+ and the generator frame.

    4. The voltage should increase with rpm up to about 35 volts (20 volts or so for the 6-volt generator).

    5. If the generator passes this test, it's working okay.

    DON'T run this test any more than a few seconds -- just enough to make the test at increasing rpm, as this test will heat up the generator.

    ~~~

  • Polarize the Generator -

    If the above test fails, it may be caused by the generator becoming depolarised (not enough magnetism to start the generating process).

    To polarise the generator, remove the fan belt, jumper wire from DF to the generator case (grounding the DF terminal). Now connect a wire from the + terminal on the battery to D+ on the generator. The generator should now start to spin. A few seconds is enough for this test.

    If the generator doesn't spin, it's faulty. It's rebuild time (or at least it needs an auto electrician to look at it).

    ~~~

  • Check the Results -

    Now put the fan belt back on, leave the DF terminal grounded, and check for the high voltage from D+ to ground with the engine running at high rpm. If you don't get the high voltage (up to 35 volts for the 12-volt generator or 20 volts for the 6-volt generator), the generator is probably faulty.

    If you get the full voltage, but when it's all connected back up and you don't see the normal charge voltage at the battery (14.5 volts for 12-volt generators or 7.2 volts for the 6-volt generator), the regulator is probably faulty.

    Hopefully these tests will identify your problem and you can get it fixed yourself without great expense. You'll have learned more about the electrical systems in a car, and won't get stuck at a critical time with a dead battery.

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    68autobug

    Hi,

     

    Check out the things listed by Wayne and that should tell you what is playing up...

    but if the wiring is incorrect...

    You are still going to have the problem...

     

    If You have an Alternator - the dash lamp MUST be connected for the alternator to work.... the bulb causes it to work...

    For a generator... its just a telltale lamp...

     

    I'm presuming You have a Generator, if You have a regulator...

    the large square regulator under the rear seat

    or on top of the generator in early models...

     

    If You have an Alternator - the large regulator is NOT used...

     

    Best of Luck

     

    Lee Noonan  - 68Autobug

     

     

    http://community.webshots.com/user/vw68autobug

     

     

    Lee Noonan
    __________________
    68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

    http://community.webshots.com/user/vw68autobug
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    32fire3
    im having troubles i replaced a fryed voltage regulater  put new brushes in the generator  did the above test i get 13. 5 volt at a pretty hi rpm.  c the charge light will go out but only if i rev. the motor so it looks like i may need a new generator let me know Wayne thanks
    dave abercrombie
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    68autobug

    Hi Dave,

    Did You polarize the generator, as Wayne suggested...

    as 13.5 volts is close to being OK...

    Are all the connections nice and clean?

    Battery earth/ground clean under the connection to the body?

    All connections were shiney when new but after all this time, the copper gets contaminated...

    and there is voltage drop or loss....

    a wire brush works great....

    just make sure one of the battery connections are off...

    and clean them too....

     

    cheers

     

    Lee Noonan

     

    http://community.webshots.com/user/vw68autobug

     

    Lee Noonan
    __________________
    68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

    http://community.webshots.com/user/vw68autobug
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    32fire3

    yes i polorized it but that 13.5 volt is with the gen. unhooked doing the test that it should be putting out 35 to 40 volts so i would think i need a new gen.

    dave abercrombie
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    68autobug

    Dave,

     

    with the generator unhooked...

    thats not good....

    it certainly won't keep the battery charged...

    looks like a replacement generator...

    I upgraded to an alternator...

     

    Best of Luck

     

    Lee Noonan   - 68AutoBug - Australia -

     

     

     

    http://community.webshots.com/user/vw68autobug

     

    Lee Noonan
    __________________
    68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

    http://community.webshots.com/user/vw68autobug
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