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Should my volt meter be reading 12v when car is off? #1212331 04/08/12 03:04 PM 04/08/12 03:04 PM
Joined: Mar 2004 Posts: 3,287 Dalton, MA Slipknot440 OP master
Slipknot440 OP master Joined: Mar 2004 Posts: 3,287 Dalton, MA	Should my volt meter be reading 12v when the car is off? Its an after market unit I put in my 68. Last edited by Slipknot440; 04/08/12 03:51 PM.

Re: Should my volt meter be reading 12v when car is off? [Re: Slipknot440] #1212332 04/08/12 03:10 PM 04/08/12 03:10 PM
Joined: Jan 2003 Posts: 26,008 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 26,008 Rio Linda, CA	A fully charged 12V battery should put out about 12.5 volts. If you have a voltmeter in the car it shouldn't read anything with the ignition switch off, it should only be powered with the switch on. The INTERNET, the MISinformation superhighway

Re: Should my volt meter be reading 12v when car is off? [Re: Slipknot440] #1212333 04/08/12 03:53 PM 04/08/12 03:53 PM
Joined: Jan 2003 Posts: 5,448 So Cal Sinitro master
Sinitro master Joined: Jan 2003 Posts: 5,448 So Cal	You have connected it wrong... The 12V should only be live when the key is ON.. Find another 12V source to connect to.. Just my $0.02..

Re: Should my volt meter be reading 12v when car is off? [Re: John_Kunkel] #1212334 04/08/12 03:53 PM 04/08/12 03:53 PM
Joined: Mar 2004 Posts: 3,287 Dalton, MA Slipknot440 OP master
Slipknot440 OP master Joined: Mar 2004 Posts: 3,287 Dalton, MA	I think I wired it into a full time 12v source is why, will this burn up my battery?

Re: Should my volt meter be reading 12v when car is off? [Re: Slipknot440] #1212335 04/08/12 04:16 PM 04/08/12 04:16 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	I don't think a simple voltmeter uses too much power, but still uses it none the less. You could re-wire it to a switched source though.

Re: Should my volt meter be reading 12v when car is off? [Re: Slipknot440] #1212336 04/08/12 05:59 PM 04/08/12 05:59 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	I would rewire it to a switched source. It takes so little power it might never be an issue, however I still don't like having things powered on my car when I'm away.

Re: Should my volt meter be reading 12v when car is off? [Re: DaytonaTurbo] #1212337 04/08/12 08:24 PM 04/08/12 08:24 PM
Joined: Jan 2003 Posts: 21,085 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,085 Niles , Ohio	I agree find a switched power source.They tell you to use switched power.It will drain the battery and the gauge might get hot as it will be on 24/7.Rocky Chrysler Firepower

Re: Should my volt meter be reading 12v when car is off? [Re: Slipknot440] #1212338 04/08/12 08:25 PM 04/08/12 08:25 PM
Joined: Nov 2004 Posts: 25,050 Texas GoodysGotaCuda 5.7L Hemi, 6spd
GoodysGotaCuda 5.7L Hemi, 6spd Joined: Nov 2004 Posts: 25,050 Texas	Quote: I think I wired it into a full time 12v source is why, will this burn up my battery? Burn up? No, but it'll put a constant draw on it that you don't want. Find a key switched source. 1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi 2020 RAM 1500 [img]https://i.imgur.com/v9yezP9.jpg[/img]

Re: Should my volt meter be reading 12v when car is off? [Re: Slipknot440] #1212339 04/08/12 08:45 PM 04/08/12 08:45 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	weird you should say somethijng. Yesterday at te track I noticed (and I just checked) with the key out my amp gauge is just to the right of the "0" never noticed that before. I just put an new steering column in and was having fits at the track yesterday

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