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12 volt connecter wiring - Car Audio & Video

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Depends what you are using. Usually the centre pin is positive.

Posted on May 18, 2017

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48 volt club car 4 12 v batteries one batterie checks 20 v when I single it out when I unhook it it checks 12 v


If you have 4 off 12 volt batteries connected in series (positive to negative leaving a positive terminal and negative terminal with no wires on then that is 48 volts. To check the batteries you have to disconnect each battery and have a load test done on each battery for 12 volts and dead cells. To get 20 volts you still have 2 batteries connected together with a good battery connected to a battery with a dead cell or else you would have 24 volts.

Oct 03, 2013 | Cars & Trucks

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Need to know where the positive wires that connect to the battery of a '95 Toyota previa connect.


Hi

The black wire will be connected to the body or engine of the van and the red or positive wire is connected to your starter motor.
You can also use a 12 volt battery light to check the negative or positive wires.
You take the 12 volt battery light and place the negative black wire clip to an earth on the vehicle, then when you touch the tip of the 12 volt battery light onto a positive wire the light will light up.
Then you will know which wires are negative or positive sometimes the key has to be on for some wires to work.
Cheers

Oct 10, 2012 | 1995 Toyota Previa

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Can't save radio stations, have to tune the radio everytime I turn the car on. It doesnt work if you hold the numbers down. Can you help?


A common error wiring an after-market car stereo is where to connect the BATTERY and ACCESSORY wires. Under most conditions, these two wires do NOT get connected to the same point. The BATTERY wire connects to, well, the 12 volt positive terminal of the battery (or any 12 + volt source that is ALWAYS powered). This allows the radio clock to keep time and maintain the radio station presets when the vehicle is off / key is removed.

The ACCESSORY wire is connected to a point in the vehicle's electrical system that has 12 volts + whenever the ignition key is turned to the Run or Acessory position. When the key is NOT in these positions, the point should go from 12 volts + to 0. This change tells the radio to turn on or off, depending on the key position. The radio will power down when the key is removed, so you do not need to manually shut the radio off. This can save the battery if the radio volume was very low. The ONLY time you would accept both of these wires to be connected to the same point is when they are BOTH connected to the 12 volt + terminal of a battery (or wire that is always powered). If you wire this way, you will have to tune the power on and off each time you want to listen to the radio.

Check you manual for color or lable of these two wires, and place them as needed for the desired operation 1) Both on a constant 12 volt + source, or 2) BATT to a constant 12 volt + source and ACC to switched 12 volt + source.

I hope this helps. Please rate my reply with "4 thumbs up" if it did. Thanks!

Usually, purchase of a wiring harness designed specifically for your vehicle model and stereo solves this problem - as the required voltages and signals - including speakers - are made up and it is simply a "plug and play" operation. Newer cars will often require a "magic box" if you will, that uses some data signals in the car to turn on and off voltages for the stereo. Not installing the "magic box" will prevent much of the radio from working and can cause the loss of chimes, etc.

If your vehicle doesn't require the magic box

Aug 01, 2011 | Panasonic Car radio CD CQ-C1110GN CD...

1 Answer

I plug my radar in and as soon as i do it turns on for a breif second then shuts off. the cord is cut and the wires are wired into the car can this have anything to do with it?


Make sure that your ground and your 12 volt positive connections are secure. Did you wire the 12 volts to the fuse blox or to a wire under the dash? If you connected it to a wire under the dash, that wire may not have 12 volts or it may have 12 volts but not enough current to operate the detector.

Jun 08, 2011 | XTR-550 Radar Detector

1 Answer

How to memoriese radio channel. my jvc car radio whenever I set the station and when I switch off engine next time I have to tune again.pls solve my problem


Hello my name is Israel. The problem is with the wiring connection. You will need to make sure that the yellow wire is connected to a positive 12 volt source at all times. What is happening is that the wire is connected to a switched 12 volt. Reconnect wire to a constant 12 volt source. Good Luck.

Feb 14, 2011 | JVC AM FM CD DET FACE CAR STEREO

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JVC KW-AVX710 not save. after switch off the car .when start it again all settings become to default


If your unit is not maintaining it's memory, it may be associated with the lack of a constant 12 volt power source. Test the units yellow wire, it should rest at 12 volts with the key in all positions; off, acc, on/run, start. This yellow wire should be connected to the vehicle's battery wire. Also, test the red wire. This wire should be connected to a switched 12 volt power source. It should read 12 volts with the key in accessory and on/run only. If you used a vehicle specific wiring harness to complete the installation, the wires may be switched in the harness. It's not a common issue but, I have seen it happen.

Dec 04, 2010 | JVC KW-AVX710 Car Monitor

1 Answer

The radio will not hold memory


If your radio will not hold memory then you are lacking a constant 12 volt power source. Check the yellow and red wires at the radio. The yellow wire should be connected to a constant 12 volt power source (battery) and the red wire should be connected to a switch 12 volt power source (accessory or ignition).

Nov 23, 2010 | Pioneer DEH-2800MP CD Player

1 Answer

Starter stay engaged after it starts


If your starter stays engaged after the vehicle starts with the remote starter then, the vehicle's starter wire is receiving 12 volts, most likely from the remote starter's ignition or accessory wires. Check the connections to the vehicle's wiring: the battery wire is constant 12 volts, regardless of key position. The accessory wire(s) is 12 volts with the key at accessory and on/run (position 1 & 2), the ignition wire(s) is 12 volts with the key at on/run and start (position 2&3), and the starter wire(s) is 12 volts with the key in the start position (position 3) ONLY. Make sure that the remote starter wires are connected to vehicle's wires as directed by the Bulldog instructions.

Nov 17, 2010 | Remote Starter with Keyless Entry

1 Answer

Hi,i am seeking a wiring diagram for a 1998 Toyota regius that also includes the sterio/cd/tv/nav wiring color codes. its a KCH46 3ltr turbo deisel. Thank you for any assistance, colin.


I have been unable to find a wiring diagram for this vehicle since it is an import, but I can still help.

Use a multimeter to test each wire by connecting one end of the multimeter to a wire, and the other end of the multimeter to a ground. Find your constant 12 volt wire (12 volts present with the key off), find your 12 volt ignition wire (12 volts present only when key on), find your ground wire (usually black or green).

To find your speaker wires, take the remaining wires and a 1.5 volt AA battery, while connecting 2 wires at a time to the + and - side of the battery and listen for a crackling sound from each speaker.

Jul 11, 2010 | Toyota Car Audio & Video

1 Answer

I WOULD LIKE TO KNOW HOW TO HOOK UP THE RED AND YELLOW WIRES FROM A JVC KD-R400 CAR STEREO TO THE WIRING OF A 1999 PONTIAC MONTANA


The red should be ACC. Meaning it only supply 12 volts when the ignition is in the acc position or in the on position or when the car is running. It do not supply 12 volt if the ignition is off. The yellow wire is Battery(sometimes called B+). That means it has 12 volts at all times even the ignition is off. This wire is responsible for memory. Get a meter or a test light. Turn the ignition off and find which wires has 12 volts, you caonnect that to the yellow wire. Now turn the ignition key to ACC, and find the wire that has 12 volts, now turn the key off , the 12 volts should go away, You connect that to the red wire.

Nov 25, 2009 | Vehicle Parts & Accessories

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