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September 04, 2015, 04:32:25 pm

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Author Topic: Ammeter Wiring  (Read 161 times)

dickim

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Ammeter Wiring
« on: August 27, 2015, 06:39:06 pm »
Just about to add ammeter & tacho to my 2014 C5 - understand the ammeter is position "inline" on the positive feed - do I go before or after the ignition switch ? Thought was if I go before it should not work until ignition in on position unless there is a "drain" somewhere, but also don't want to create issues........

Thanks

Arizoni

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Re: Ammeter Wiring
« Reply #1 on: August 28, 2015, 08:09:57 pm »
If you install the ammeter just before or just after the ignition switch I can't see that it makes much difference. 

Jim
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1999 Miata 10th Anniversary

Freddy1

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Re: Ammeter Wiring
« Reply #2 on: August 31, 2015, 07:09:12 am »
My opinion is that the ammeter must be connected in series to the "small red cable" that comes from the battery.
Instead if it is connected before or after the power switch the ammeter shows "only" the current consumed by the system, but does not show if the battery is charged or discharged

barenekd

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Re: Ammeter Wiring
« Reply #3 on: August 31, 2015, 03:46:16 pm »
The ammeter won't show the voltage level however it's connected. Its job is to show whether or not the charging system is working. The ammeter won't drain the battery wherever it's connected, before or after the switch. If there is a constant drain of the battery like a clock or some such, it would show the discharge, but the ammeter isn't causing it
You need a voltmeter to tell if the battery is charged or not.
Bare
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Freddy1

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Re: Ammeter Wiring
« Reply #4 on: August 31, 2015, 05:18:22 pm »
Sorry but I expressed myself badly cause I do not know the English language (I'm from italy and i  use google translator).
I meant that ammeter only if it is connected in series with the battery shows whether or not the charging system is working.
Instead if it is connected in series with the ignition switch shows only the consummation  partial of ampere of circuit , but not the working of charging system

Arizoni

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Re: Ammeter Wiring
« Reply #5 on: August 31, 2015, 05:47:06 pm »
I agree, bare.

A voltage meter would be a better indicator of what is really happening with the electrical system.

The volt meter can be connected downstream from the ignition switch so it is only operating when the power is turned on and it will show if the system is being charged or the battery is being discharged.

I bought our hosts voltage meter and installing it was very simple.
I connected it to the spare gray parking light wire and to ground.

Connected this way I can see the system voltage when the ignition switch is turned on if my headlight is also turned on so, it is acting as both a system voltage monitor and a "Headlight is on" monitor.  :)


Jim
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1999 Miata 10th Anniversary

dickim

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Re: Ammeter Wiring
« Reply #6 on: August 31, 2015, 08:53:41 pm »
Thanks guys - seems any way will do - never wanted it to show as VOLTAGE (am looking at a small voltmeter connected to the battery for that) - just to see if there is a constant drain from something alongside it's charging rate when running - understand some people also use it to find "correct" position for kick starting - plus prefer to see that than the dial with idiot lights which will be relocated as led's.

JVS

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Re: Ammeter Wiring
« Reply #7 on: September 01, 2015, 05:16:19 am »
Ammeter for kick starting is based on points ignition in the real cast iron barrel models. It will be of zero help for kick starting purposes on a UCE.  :-\
« Last Edit: September 01, 2015, 05:25:44 am by JVS »
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dickim

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Re: Ammeter Wiring
« Reply #8 on: September 01, 2015, 06:55:52 am »
Learn something new everyday - love this forum :-)