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12 volt direct connection with battery

What do i need to connect direct to car battery ,as i tried with a simple 12 volt cable but it flashes in and out of charging and battery mode.
do i need to use a stabiliser ,and if yes what is this ,

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Never try to connect a laptop directly to a battery.The voltage might be 12v or slightly more but the current is a lot more than even what you get from the mains..So if you really want to connect to a battery you will need a power inverter which I think is the cheapest solution.You can get one off ebay for 10usd roughly for a 50watts inverter.Hope this helps.

Posted on Jun 25, 2009

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Posted on Jan 02, 2017

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Door Open light blinks rapidly making a clicking noise when trying to start the car and will not turn over. No lights except for the one flashing very quickly.


Sounds like you have either a dead battery or a bad connection on the positive/negative terminals or the starter motor or the ground to body connection? It is also possible for the cable to have corrosion built up inside the insulation causing a resistance? Clean your battery terminals first then if a charger is unavailable using booster cables connect the positive cable to the dead battery then the positive cable to the jumper battery then connect the negative cable to dead battery and positive cable to jumper battery and attempt to start the car if same conditions then the xonnections may either be loose or corrosion hampering voltage to be supplied efficiently! A digital voltmeter will or should show a 12-volt reading on the battery if less than 12-volts the battery needs to be charged or replaced?

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Battery is probably bad- try a another one! (Make sure terminals are clean, too).

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2001gmc jimmy wont start


Sounds like dirty corroded battery post connections...remove from battery clean and/or replace the post push in terminals...these can be purchased through your local parts store for under $5. They are push out...push new in also clean inside the battery connections...be sure new posts are tight...all systems will need to reset after the dis-connect...Hope this helps.

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I am having a problem with my daughters 1998 subaru forester. sometimes it will start and sometimes it will turn over slow or just click.i checked the battery with a volt meter and got 12.4 volts ,it


It sounds to me like you have a dead cell in your battery it can have 12 volts and not enough cranking amps, my shop has a tester that can tell you exactly what's wrong with it without removing it, however if you take the battery out and take it to autozone or advance they can test it for you.

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92 v12 will not start


12 cylinder engines all seem to have the crank angle sensors fail.

The two sensors are located in the top of the bell housing and are visible just down in front of the firewall. Not too difficult to replace...just fiddly . Position of sensors is 11 o'clock and 2 o'clock on the bell housing.

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Starter not getting voltage


The starter gets powered by the solenoid which is energized when the ignition key is turned to the start position. Look at the picture below and read the sequence of operation below it. Once you find out what is NOT happening - you can troubleshoot back from there.

8_23_2012_9_53_22_pm.jpg

The IGNITION KEY SWITCH is connected by a small wire to the terminal in the GREEN circle on the SOLENOID. The battery is connected by a thick, heavy cable to the terminal in the RED circle of the SOLENOID. The terminal in the YELLOW circle of the SOLENOID is connected to a thick, heavy cable that goes directly into the STARTER MOTOR.

The -12 volts from the battery is connected to the car's engine, frame and body. The entire car has -12 volts available to all electric (and mechanical) parts, so only one wire is needed to energize those parts.

When the key is held in the START position, +12 volts from the battery is passed through the IGNITION SWITCH to the GREEN terminal on the SOLENOID. This causes the SOLENOID to (1) become energized, (2) internally physically connects the +12 volts RED terminal to the YELLOW terminal and (3) physically engages the STARTER to the engine's flywheel. When this happens, the +12 volts from the battery appears on the YELLOW terminal; and directly into the STARTER MOTOR. The STARTER MOTOR spins. Since it is engaging the flywheel, the flywheel turns too and the engine attempts to start. Once the engine is running, the key is released. The SOLENOID (1) becomes de-energized (2) opens the physical connection between the RED and YELLOW terminals, (3) disengages the STARTER MOTOR from the flywheel and the STARTER MOTOR stops spinning.

I hope this helps!

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1 Answer

I have a 14 volt source but when I try the winch in either forward or reverse the voltage drops to 4 volts. The drum is not seized because you can pull the cable out easily by hand.


Not only do you need a 12 volt supply (13.8V) to operate this winch, but you also need a.) wire large enough to carry the electrical load, and b.) a power source that has the necessary current (amps) to turn the motor.

If you have wires that are too small, they will heat up and not be able to deliver the current (amps) required by the motor. If your power source is to small - it can not supply the current required. The result of either conditions is "voltage drop". This can be explained the same way your car needs a 12 volt car battery to start. If that car battery was dead, you couldn't connect eight "D" cell batteries (8 x 1.5volts = 12 volts) together and attach to the car's battery cables and expect it to start. This is because the amount of current available in the car battery is hundreds of time greater than eight "D" cell batteries - even though when the D cells are connected in series - both systems deliver 12 volts.

If neither of the above conditions is present, then there could be an electrical problem with the drive motor itself. This could be a shorted / melted winding or other electrical connection that is not right, even if the drum spins freely.

Apr 04, 2011 | Electric Superwinch LP8500 Series Utility...

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How to replace the battery without reset the radio's code?


A simple way is to take another 12 volt battery and connect it with jumper cables right onto the existing battery connections. Connect positive + to positive and negative - to negative which is parallel wiring. Now remove the connections from the battery you are going to replace without knocking the connections from the donor battery loose. Once you get the new battery installed, simply disconnect the jumper cables. Make sure you connect the cables as described above to keep the voltage at 12 volts and do not connect them in series. Connect them wrong an you will have 24 volts and may damage your electronics. If for some reason you loose the code it is simple to get the code from Honda. Just go to the Honda Owners link below and register your Honda. You will need the VIN # off your car. They will provide the code free of charge.
https://www.ahm-ownerlink.com/login.asp?page=%2Fprod%5Fhome%2Easp

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1 Answer

Trying to hook my amp up in my car, I already have everything but the main power supply which is the wire to the battery.I was wondering how would i do that the right way?


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1 Answer

Garmin Nuvi 300 does not switch on. The wrong charger was used


1. If using the power/data cable to power your device:
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  2. Check the fuse in the power cable.
  3. Use a volt meter to test the end which plugs into your device (the manual for the device should show which pins are power and ground. Make sure you are getting at least 12 volts of power. This will ensure you are getting full power through the cable and determine if the cable is faulty.
2. If using a 12 volt cigarette lighter adapter:
  1. Check the fuse in the adapter.
  2. Make sure the cigarette lighter in the vehicle has power by connecting another device with a different 12 volt adapter if possible.
  3. Make sure the metal tip on your 12 volt adapter is still connected
3. If using batteries:
  1. Make sure none of the battery terminals are still connected to the device.
  2. Try new batteries.
  3. Make sure the batteries fit tightly inside the device. This will ensure the battery terminals are not loose and you have good contact.
4. If you are powering the device on the built in lithium ion battery:
  1. If you have a power cable for the device, plug it into a power source and see if the device will power on with direct power. If it powers on, check to see if the battery is fully charged.
  2. If it is not, let the battery fully charge and then try to power it on with just the battery.

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