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alternator trouble 1800 1972

posted by  someone claiming to be TurboZamboni on  Mon Oct 11 08:43 CST 2004 [RELATED]

From one problem to another...

Just got the vacume leaks repaired and along with the instalation of the crane cams xr700 ignation box my 1800E runs better than she ever has (at least in the two years of our relationship) the problem is that the car runs of the battery, the alternator will not recharge. I replaced the alternator, and voltage regulator and the AMP light on the dash stays on after ignition. Any sudgestions?

Thanks
TurboZamboni








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    Problem Solved 1800 1972

    posted by  someone claiming to be TurboZamboni on  Sat Oct 16 10:09 CST 2004 [RELATED]

    Thanks for all the great leads. While testing some of them out it turned out to be a bum replacement altornator. I traded it in for a working unit and all is well again... for now at least.

    TurboZamboni








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    alternator trouble 1800 1972

    posted by  Phil S. on  Mon Oct 11 13:31 CST 2004
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    last visit: Fri Oct 24 13:18 CST 2014
    [RELATED]

    Well, if it's not the alternator or regulator (and we know the amp light circuit is good), you have a wiring problem.

    Check continuity of the field wire (DF). Check continuity of the B+ wire to the battery positive terminal. Double-check that the alternator and regulator are both grounded.








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      alternator trouble 1800 1972

      posted by  someone claiming to be TurboZamboni on  Mon Oct 11 17:57 CST 2004 [RELATED]

      The for the '72 1800, the 55amp alternator is the propper replacement, right? not the 35amp verison?

      TurboZamboni








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        alternator trouble 1800 1972

        posted by  Phil S. on  Tue Oct 12 05:26 CST 2004
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        last visit: Fri Oct 24 13:18 CST 2014
        [RELATED]

        Yep -- the fuel injection models automatically got the 55 amp alternator.








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          alternator trouble 1800 1972

          posted by  someone claiming to be Derek UK on  Thu Oct 14 22:56 CST 2004 [RELATED]

          When you change from a 35 to a 55amp Alternator do you need to change the regulator? i.e. Do they each have a matching regulator?








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          alternator trouble 1800 1972

          uid 4846's pic
          posted by  JohnMc on  Tue Oct 12 06:16 CST 2004
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          last visit: Thu Oct 23 07:42 CST 2014
          [RELATED]

          That rings a bell to me. My PV got a new (er!) alternator system from the '73 145E it got it's motor from. After a little bit of use the tired old 35 amp'er gave out. I got a 55 amp replacement, hooked it up, and proceeded to have lots of weird symptoms, mostly resulting in dead batteries. I *finally* figured out that the new alternator had two separate outputs. One was left unhooked when I installed the alternator, and the regulator was carefully regulating the field strength so it would have 14 volts. This left the attached circuit woefully under charged. Adding a jumper between the two outputs made everything work perfectly.

          No clue if this is pertinent in this case or not.
          --
          I'm JohnMc, and I approved this message.








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            alternator trouble 1800 1972

            posted by  rvvr on  Thu Oct 14 06:18 CST 2004
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            last visit: Fri Dec 3 00:15 CST 2010
            [RELATED]

            Did you check the condition of the ground strap . Grounds the engine to the frame,,I have seen these straps in poor condition and causing all sorts of problems.GOOD LUCK!







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