Results 1 to 6 of 6

Thread: New Generator Mystery

Forum to discuss Austin Healey Sports Cars

  1. #1
    Freshman Member
    Join Date
    Apr 2018
    Location
    Lawrenceville,Ga
    Posts
    6
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    New Generator Mystery

    1967 3000 BJ8... owned since 1969.. last month the generator light came on... tested generator... nothing.. gen original to car..I have replaced brushes before.. decided maybe it was time to get a rebuild and replace it.. got new gen.. installed and polarized... tested..getting 14 volts at 1000 rpm... gen light on at idle of 1000 rpm... slowly raised rpm.. light went out at 2000 rpm ..lowered rpm... light stayed out till back down to 1000..stayed consistent... original voltage regulator ... I thought 'ha'..I can solve this problem.. spare voltage regulator on shelf.. I have had it 15 years..still sealed in bag..still in the box... installed.. now gen light stays on all the time !!!!.. checked connections.. re-polarized gen.. didn't open up regulator..I see some saying to clean the points inside.. I'm a bit stumped..
    Last edited by Editor_Reid; 03-01-2020 at 02:21 AM.

  2. #2
    Jedi Warrior
    Join Date
    Oct 2014
    Location
    Western Canada
    Posts
    526
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: new generator....

    It's not difficult to access the points and check them. Or you could try a new solid state regulator. Or some other issue that will take more detective work may well be the cause of the problem.

    The regulators seem quite durable. Recently, I thought that the original style regulator on my 100-6 was not working right. It looked quite grungy inside, so I replaced it with a new solid state regulator. That did not solve the problem, and I had to dig deeper to solve the issue (turned out to be some other wiring issue). After installing the shiny new solid state regulator, I left it installed, even though the old one likely was still fine.

  3. #3
    Luke Skywalker vette's Avatar
    Join Date
    May 2002
    Location
    Pa.
    Posts
    1,892
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    18
    Thanked in
    16 Posts

    Re: New Generator Mystery

    Even tho your second regulator was in the original packaging I would suspect that the points were not that clean. Just oxidation from all those years would do it. I would pass some fine (maybe 600 to 1000 grit) paper across the points to clean them up. If that doesn't do it and you are sure your wiring is installed correctly, then I would start at the beginning with the test that the book describes.
    About TV Shows-
    "...you really can't restore a car in 10 days. I don't want to watch a race where people have to restore it in a week. It's not going to drive, and those cars never work. In real life, it takes years to get it right. " Jay Leno.

  4. #4
    Jedi Warrior
    Join Date
    Nov 2012
    Location
    Warrington PA
    Posts
    566
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: New Generator Mystery

    Start at beginning, is belt tight enough and correct size? Prob cheapest point to start with.

  5. #5
    Obi Wan RAC68's Avatar
    Join Date
    May 2010
    Location
    NJ Shore
    Posts
    2,149
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    29
    Thanked in
    27 Posts

    Re: New Generator Mystery

    Hi All,

    Randy has a good point.

    When changing from generator to alternator with internal regulator, all looked good but after every start-up and during a short test drive the charge light would begin to glow brighter and brighter. Upon return to the garage and after a short engine cool down, investigating all components within the engine compartment, presented no issues. Originally thinking the new alternator was the culprit, I returned the unit and installed the replacement with no satisfaction. Since both alternators were Delco rebuilds, I purchased a new unit but again experienced a red change light. Again, returning the new unit to be checked, no issues could be found by the manufacturer and again the new replacement provided also turned the light on. Since rewiring a few times and 4 alternator replacements did not seem to correct the issue, I was ready to return back to my generator.

    Scheduled for a local town car show, I attended the gathering as it was nearby and felt I could easily run on the battery if needed. However, on the drive home with headlights on, again the charge light began glowing and for some reason I pulled over, stopped the engine, and opened the bonnet to briefly investigate. Moving my hand around the alternator, I happened to hit the fan and it moved easily. Problem solved. It seemed that when the belt was cool or cold, it would grip the pulleys. However, with a little engine heat the belt would begin to slip until it had no grip at all. As it cooled, the belt would again regain proper grip and the alternator would charge properly. Changing the belt resolved the issue.

    Just one of my Healey experiences over the years,
    Ray(64BJ8P1)

  6. #6
    Freshman Member
    Join Date
    Apr 2018
    Location
    Lawrenceville,Ga
    Posts
    6
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: New Generator Mystery

    problem solved ... I opened the old voltage regulator and the points were pitted just a bit... I used 600 grit sandpaper and cleaned them.. gen light stays out even at idle !!!!..new 'old stock' voltage regulator never worked..opened it.. cleaned points.. still a mystery.. but easier to get a new one if needed...

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •