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Thread: Ammeter Backwards - do I care?

  1. #1
    Join Date
    Apr 2004
    Location
    Lake Bluff - USA
    Posts
    55

    Ammeter Backwards - do I care?

    In addition to my persistent rear seal leak (hasn't really gotten better) and installing a SPAL fan, I am trying to work out one last bug this summer. Battery hasn't been charging right - replaced the voltage regulator - still not quite there - after testing again, replaced the alternator.

    Before firing back up, one small thing regarding the Ammeter. Mine came with the dash harness factory installed. When I turn out the lights (or anything else) the Ammeter shows postive rather than discarge. Already have the dash off - should I just switch the wires?

    (when looking at the back of the Ammeter, Batt is on the right - all of the ACC are on the left).

    Saw some other threads - do I care that it reads backwards?

    Dave

  2. #2
    Join Date
    Nov 2003
    Location
    La Plata, Maryland, USA.
    Posts
    421
    The way the ammeter is wired will not affect the electrical charge/discharge conditions in your car. It will just indicate charge when in fact your battery is discharging, and vice versa. The fix is to just reverse the two wires that connect to the two posts on the back side of the ammeter. Easier than trying to remember to flip the reading over in your head

    Jim Harding
    La Plata, Maryland

    1982 #3004

  3. #3
    Join Date
    Feb 2003
    Location
    Birmingham, AL, USA.
    Posts
    487
    Mine did the same thing. Just reversed wires and works fine.

  4. #4
    Join Date
    Sep 2004
    Location
    ranburne, alabama, USA.
    Posts
    620
    just letting it run dave, and rearend, leaking too, may take a winter spell and fix all of it.Will-alabama

  5. #5
    Join Date
    Jun 2003
    Location
    Huntsville, Al, USA.
    Posts
    104
    Dave,
    I agree it is just a simple swap places with the wires. Just make sure you disconnect a battery cable first, you don't want to make your day any worst than it already is.
    Keith

    Keith

  6. #6
    Join Date
    Nov 2003
    Location
    La Plata, Maryland, USA.
    Posts
    421
    Good point Keith!

    Jim Harding
    La Plata, Maryland

    1982 #3004

  7. #7
    Join Date
    Jan 2003
    Location
    shreveport, la, USA.
    Posts
    396
    mine is reverse sensing also, but i keep saying that i'll fix it next time i have the dash off, haven't had to do that, so still reverse sensing.

    doug

  8. #8
    Join Date
    Oct 2003
    Location
    sweeny, texas, USA.
    Posts
    507
    Ditto to what dmiller stated. Does bug me a little that the cars still come out of Unique with the same wiring glitch.

  9. #9
    Join Date
    Apr 2004
    Location
    Lake Bluff - USA
    Posts
    55
    Thanks guys - making the switch tonight.

    Good reminder to make sure the battery is off. In my pre-car build days when cared about home remodeling, I once wired two three way and one four way switches for a three story back porch area. (all the lights on each story would turn on or off from any story- hairy looking diagram). I was so proud that it worked on the first time that I forgot to flip the fuse back to off when I was patching in the last light. Nothing like the feeling on a 6 foot ladder of putting the wire cutters through a live wire!!

    Thanks again,

    Dave

  10. #10
    Join Date
    Jan 2003
    Location
    Sarnia, Ontario, Canada, Canada.
    Posts
    253
    Dave.
    My ammeter has NEVER worked ( 13 years )
    Has not proved to be a problem.
    Mike

    Mike Geddes

  11. #11
    Join Date
    Nov 2003
    Location
    Mississippi Gulf Coast and Central Florida
    Posts
    2,155
    Dave,

    Hairy looking diagram to say the least [}]!

    First try is impressive!

    I think many of us know that feeling on the ladder, though [8D]...

    Paul

    289 FIA

    2899464

    408 Windsor

    Toploader (wide)

    3.07 rear


  12. #12
    Join Date
    Mar 2003
    Location
    Ridgecrest, CA, USA.
    Posts
    246
    Never cut through a live wire on a ladder but I did inadvertently pee across one of my grandfathers live electric fences when I was little kid. Never liked fooling with electricity since......strange huh?

    Phil Souza

  13. #13
    Join Date
    Nov 2003
    Location
    Mississippi Gulf Coast and Central Florida
    Posts
    2,155
    [:O][:O][:O]

    Paul

    289 FIA

    2899464

    408 Windsor

    Toploader (wide)

    3.07 rear


  14. #14
    Join Date
    Apr 2004
    Location
    Lake Bluff - USA
    Posts
    55
    Did the fix - no electric shocks....testing involved waking up the neighborhood peeling around.....

    do love this car...

    Dave

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