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Battery Terminals with built in voltmeter 

 

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 Post subject: Battery Terminals with built in voltmeter
Posted: Mon Jan 23, 2006 3:15 pm 
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I got one of those battery terminals with a built in voltmeter a while ago and put it on the positive wires and hooked the earth wire from it to ground and it works and all that, but stops the car from charging the battery while it's on. When this terminal is fitted the battery voltage can't even get to 13V, with it off 14V no problems. Just wondering if this just a queer terminal or if there all like this - as I like the idea of a voltmeter on my battery so am keen to try another one...

 

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Posted: Mon Jan 23, 2006 7:27 pm 
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is it a jaycar one ??

mines been fine accept i stripped the bloody thread in it and now it wont go tight

 

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Posted: Mon Jan 23, 2006 7:40 pm 
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http://cgi.ebay.com.au/NEW-BATTERY-TERM ... dZViewItem
that's the one I have (that ain't no good). thought about trying this one but:
http://cgi.ebay.com.au/GOLD-PLATED-BATT ... dZViewItem
otherwise how much are the JayCar ones? What brand are they? JayCar sells a lot of AmpKing or something along that line brand gear that seems to be decent quality...

 

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Posted: Mon Jan 23, 2006 7:46 pm 
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What are you using to measure it?

I've found alot of those terminals are poorly calibrated compared to an expensive quality multimeter - good news is on the whole they are adjustable.

 

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Posted: Tue Jan 24, 2006 10:55 pm 
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What you mean data_mine?
The problem I'm having is that it stops the alternator from charging the battery for some queer reason, not concerned about the accuracy at the moment...

 

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Posted: Wed Jan 25, 2006 1:06 am 
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twr7cx wrote:
What you mean data_mine?
The problem I'm having is that it stops the alternator from charging the battery for some queer reason, not concerned about the accuracy at the moment...


yeah i dont see how a terminal regardless of the fact it reads output voltage would stop the alternator from charging the battery capacity...the alternator wire is definently getting enough contact when connected to the terminal in question? how do u know the alternator is charging at all when you are checking this cause i take it you are doing it at idle....and seeing on the dash the voltage read round 14v ? cause most wont even try to charge unless it see the engine producing 1850rpm

 

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Posted: Wed Jan 25, 2006 4:25 pm 
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how do I know the alternators not charging?
I fit the terminal, start the car drive it and the voltmeter on the cluster sits very low and gradually gets lower. Turn the car, go to start it, bit of cranking over and then nothing, flat battery.
Charge battery up, fit normal style terminal and everythings normal.
And I've tried this terminal twice now to be sure.

 

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Posted: Wed Jan 25, 2006 4:44 pm 
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I've got a Jaycar one, I'm just wondering if the volt reading turns off automatically?? I missed out on Aaron's Stinger ones :(
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Posted: Wed Jan 25, 2006 5:13 pm 
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Yes they do turn off automagically.

 

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Posted: Wed Jan 25, 2006 5:25 pm 
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twr7cx wrote:
how do I know the alternators not charging?
I fit the terminal, start the car drive it and the voltmeter on the cluster sits very low and gradually gets lower. Turn the car, go to start it, bit of cranking over and then nothing, flat battery.
Charge battery up, fit normal style terminal and everythings normal.
And I've tried this terminal twice now to be sure.
Have you connected the alternator output wire up to the terminal correctly? It needs a direct connection to the battery via the terminal, not through any fuse or diode output that the new terminal may be giving you, these are designed to power AMPS and other equipment not to take power in.
Cheers
TW.

 

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Posted: Wed Jan 25, 2006 6:33 pm 
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twason wrote:
twr7cx wrote:
how do I know the alternators not charging?
I fit the terminal, start the car drive it and the voltmeter on the cluster sits very low and gradually gets lower. Turn the car, go to start it, bit of cranking over and then nothing, flat battery.
Charge battery up, fit normal style terminal and everythings normal.
And I've tried this terminal twice now to be sure.
Have you connected the alternator output wire up to the terminal correctly? It needs a direct connection to the battery via the terminal, not through any fuse or diode output that the new terminal may be giving you, these are designed to power AMPS and other equipment not to take power in.
Cheers
TW.


and thats what ive been thinkin really sounds like the alternator cable isnt getting enough or any contact at all....make sure also inside the terminal where u have previously connector the alternator wire that if the first time u connected it and it was almost not close enough it may have been arcing and has stuffed up the connection area inside the terminal if you follow me

 

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Posted: Wed Jan 25, 2006 8:10 pm 
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yeah i shinned up inside the whole you put it in and shined up the end of the cable and screwed her down, she's definately in.

 

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Posted: Thu Jan 26, 2006 1:55 am 
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yeah, the jaycar ones turn off after they have been on a set voltage for a little while, i.e. 13.3 - 13.7v

they can't be on all the time!
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Posted: Thu Jan 26, 2006 8:32 am 
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They can be on all the time, they take two tens of f**k all power.

Other things in your car put a higher drain on the battery when it's off. clock, stereo, ECU keepalive, headlights (if you're a numpty :lol:)

I happen to have several meters in the car, one on the terminal, one on my 2F capacitor (whichis automatic), and another one that measures voltage and current (this one stays on all the time).

 

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Posted: Thu Jan 26, 2006 8:54 pm 
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twr7cx sounds like the terminal has a internal short, or is causing a voltage drain somehow.

 

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