The ammeter in my console - Team Camaro Tech
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post #1 of 7 (permalink) Old Jan 22nd, 01, 10:07 PM Thread Starter
Join Date: Jan 2001
Location: MT, USA
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Sorry its late and this just hit me otherwise i would have included it with the other question. In my '69 Z28/RS i have the guages in the console. The ammeter seems to move like very very little if at all. I would like to know if this is normal, because it seems strange that the scale whould go from -40 - 40, if it only moves like not even 5. But i could b wrong, so i appreciate the input.

'69 Z28/RS
'89 Bonneville SSE
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post #2 of 7 (permalink) Old Jan 23rd, 01, 01:03 AM
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OEM amp gauges barely move, That's why I always use an aftermarket gauge. Both gauges are shunt-fed, meaning the gauge is measuring current in parallel with a specified section of wire, read "a calibrated amount of ohms", and the meter is measuring roughly a very small % of current through its coils to deflect the meter. All of this within the gauge itself. It may by chance even be hooked up wrong, but I doubt it. You could always borrow an amp gauge and temporay sub it to see.

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post #3 of 7 (permalink) Old Jan 23rd, 01, 02:00 AM
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Try a search. This has been covered but I don't recall the specifics. Some people postes that they get the gauge to react better than what you're seeing.
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post #4 of 7 (permalink) Old Jan 23rd, 01, 02:49 AM
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From your description, it sounds like everything is working properly. Unlike voltmeters found in later cars, ammeters simply measure current flow (either charge + or discharge -).

With the car running, the needle should be just to the right (+ side) of zero, which from your post, sounds like it is.


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post #5 of 7 (permalink) Old Jan 23rd, 01, 06:07 AM
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I added console guages to my 69 and at first start up my ammeter swings over to 40 then comes back twards zero as I drive. You might try hooking up another guage in the system and running it. See if gives a different indication.

[This message has been edited by HOTROD69CAMARO (edited 01-23-2001).]
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post #6 of 7 (permalink) Old Jan 23rd, 01, 12:39 PM
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My guage does the same thing. I do notice it moves more when I increase the load such as the radio and headlights. I do not have any truoble with my charging system so I assume this is normal.
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post #7 of 7 (permalink) Old Jan 23rd, 01, 04:05 PM
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A bad ground will cause the ammeter to barely move....check it out....

Steve McCorry - Central Ohio Camaro Club
'69 Camaro RS/SS-350 - Daytona Yellow
'95 Camaro Z-28 - Sebring Silver
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