Do you have a car stereo installation gone wrong story?
I once fitted a stereo to a 1956 Morris Minor belonging to a friend. I knew the chassis was positive earth, so fitted the unit into an insulated plastic console. I fitted rear parcel shelf speakers, ran the wiring under the carpet and hooked the electrical feed up to the ignition switch and battery using correct fuseholders and Lucar connectors.Cassettes played absolutely fine, the system sounded good and all was well in the world. I set the clock to the correct time and tweaked the equaliser settings to my friend’s liking.The next thing she asked me was to tune in several of her favourite radio stations and program them into the memory presets. Radio 1 on button 1, Radio 2 on button 2, Radio 4 on button 4. Presets 3, 6 and 6 were to be allocated to a few local commercial stations as she wasn’t really a classical buff so had no need for Radio 3.Hold up. No antenna!I had a spare manual telescopic antenna but didn’t want to drill the front wing and spoil what was a ‘classic car’, so I temporarily hooked the antenna up just to test the radio. I lashed the antenna base to ground at a convenient point on the metalwork, and then plugged the antenna into the stereo. Bang! Popped fuse.It took me nearly a whole packet of fuses and a lot of head scratching until I twigged that the antenna was ‘grounded’ to the positive chassis and the casing of the radio was connected directly to negative. Plugging in the antenna jack shorted out the supply lines.Problem solved by fitting an isolated screen-mounted dipole antenna behind the rear view mirror.A few years later I was asked to fit a radio for another friend into a similar car of similar vintage. I repeated my previous installation, step for step, wiring the positive feeds to the chassis of the car and running the isolated negative back to the battery. Bang! This time a fuse blew but not before the stereo had produced some smoke.Some non-purist had ‘restored’ the car at some point, but instead of retaining the original positive earth system with dynamo, had fitted a negative earth alternator and repolarised the starter motor. It was now a conventional negative earth vehicle!S***, as they say, happens!
Amp power cable installation in Kia Spectra 2007?
you need to run that wire through the firewall on the drivers side,NOT on the side were your heater is set up under the dash is located.you tie wrap the wire to the wiring harness running up the passenger fender and across the firewall to an area near the steering wheel post coming threw the firewall,then find a safe area around were your feet are located when driving and drill a hole and put a rubber grommet in the hole and run the wire into the car and hide it under the rug to the amp area.and double check were your drilling to make sure its safe to do so.hope this helps.the ground wire should be grounded out about a ft or a ft and a half away from the amplifier location on clean steel with a sheet metal screw and make sure its a safe place that will not hit anything important.never drill a hole any were near the glove box your heater box and heater core is in the way and you don't want to make a big problem from a small one.
Will someone help me with these last ten questions? ASAP (: ?
Question 1 The flow of electrical current is possible because electrons are --- able to move from one atom to another; the atom that loses an electron becomes positively charged and the atom that gains an electron becomes negatively charged. Question 2 Which statement represents how charges interact? --- Positive charges are attracted to negative charges. Question 3 You are discussing a material that readily accepts the flow of electrons. This is a description of a --- conductor. Question 4 Resistance describes a material's ability to --- conduct an electrical charge and is measured in ohms. Question 5 You need to connect your doorbell to a battery. You should select wire that will --- accept the flow of electrons. Question 6 A neutral atom can be negatively charged by --- receiving an electron from another atom. Question 7 If you were told an atom was an ion, you would know the atom must have a --- charge. Question 8 Semi-conductors can best be described as materials that --- have insulator and conductor properties. Question 9 When discussing what makes a material a good conductor you say, "It must --- readily accept electron flow." Question 10 Insulators will --- inhibit the flow of electrons.
What is the advantage of wiring car batteries in parallel versus in series?
Car (lead acid) batteries are heavy (lead) they come in 8D size about 200 Ah that volt, it is very hard to lift and maneuver into place.So if you need a bigger battery capacity (Ah) at the same voltage you can add a second one in parallel. It is very important to make sure the internal resistance of parallel batteries are equal or very close. If one has a lower internal resistance that is the one that will supply the most power and it might become overloaded. Lead acid batteries are pretty finicky about not being discharged too much, too long, they need very good care if you want them to last. A disadvantage of paralleling batteries is if one or more cell(s) inside one of the batteries goe(s) bad, the good battery will be dumping it’s charge into the bad one and you will have a bad experience and no power. Also you can not mix battery capacities lets say a 50 Ah one with a 200Ah one or different lead acid technologies, like flooded cells, AGM batteries or Gel cells.Series connection is used to get a higher voltage you should also only connect same capacity same technology batteries in series.
How do you install a car stereo?
Car stereo installation is no doubt simple but the task requires a certain level of expertise and knowledge. Until you do not have any technical know-how, you should not try installing a car stereo yourself. But if you think you can do it, then you should give it a try. See, first you have to take out old stereo from your car. For that you need to set the parking brake, carefully identify the negative cable and disconnect it from your car battery. While you do so, take immense care of the chances for short-circuiting. And then you have to unfasten all the screws used to secure the frame in place. After that, it would be easy to remove the trim but make sure you do not make haste in doing it. Deal with all the necessary components that may be obstructing the access to the stereo. Now it is the time to pull the stereo out of the panel, but do it slowly and meticulously. But wait before you go any further, observe the wiring of the stereo or better option is, take the picture. Perfect! You can now unplug the stereo connections.Here starts the installation of new stereo. Start by matching up the wires of the car’s harnesses to the new stereo’s. Assembling the mounting kit should be your next step, and connecting the power source should be immediately done as soon as you are through with assembling. Having it done, you should ground the stereo and connect other wires. Voila, you have installed the stereo. Now the remaining part is fitting it and finishing up. But prior to it, do not forget to test the stereo.
Which consumes more power thin wire or thick wire?
Let us take a simple example to understand the concept. Further let us try to find out on what factors does power loss depend.Case 1:Assume you have a thin wire of 5ohms resistance & 5A current through it.Hence, total loss=(I^2)*R=(5^2)*5=125WCase 2:Assume you have a stranded conductor made of 5 identical thin wires of resistance 5ohms. These wires are also identical to that of Case 1's wire. The 5A current is now divided into 1A through each wire.Hence, total loss= Summation of individual losses =5*(1^2)*5=25WSo what we observe? The stranded conductor consumes less power than a single thin conductor.Case 3:Now if we take a single thick conductor instead of a stranded conductor, let us see what we get.We choose its length and thickness in such a way that we get its resistance as 5ohms. The formula to calculate R of a wire is,r=resistivity*(length/area)where, resistivity depends on the material and the temperature.Now assume we got R=5ohms of that thick wire.Hence, power loss=(5^2)*5=125WNow we observe that it produces same power loss that of the thin wire! So where did we went wrong? Let us have a look at the above formula to calculate r. r is inversely proportional to area. Case 3's wire has a larger area than Case 1's. So to obtain r=5ohms, either resistivity has to be increased or the length. Assuming same working temperature and material, resistivity can't be changed. Hence, length has to be increased to get r=5ohms. Now if we cut down the length of wire so as to match it with Case 1's, r drops and hence power loss drops (which is obviously less than 125W as in Case 2).So what do we learn?1. The power loss depends directly on the length of wire but inversely with the Area of cross-section.2. The power loss depends on the material we use as a conductor.3. Increase in the temperature increases resistivity and hence the power loss increases. Now, a conductor heats up as current flows through it. Hence this increases the resistivity and ultimately leads to more power loss. So to avoid this kind of situation, we either use a fan or heat sinks to cool down the system.Hope this helps :)
Where do used car dealers like to install the GPS devices on the cars they sell?
I like how everyone sort of dodged the direct answer to the question.Answer: Probably in the most convenient yet inconspicuous place that Joe Average would find it.I once removed one from a car that I had sold to a friend; I had bought the car from another friend, and I know that there was a clear title on the car.My friend called me when the car wouldn’t start. I’m a mechanic.Looking under the dash, I noticed that the ignition wire bundle had been cut into, professionally, and tracked the wires down to a box that I initially had thought to be a long-forgotten car alarm. It *almost* looked like something stock in the car, except for the non-stock splicing.I removed the device, paired the cut ends of the wire back up, and her car started normally.Looking over the device, thinking I could get a remote for the “car alarm” (but curious why there wasn’t wire going out to the horn, lights, or external siren), I googled the numbers I found on the device.Sure enough, it was a GPS cut-off switch. I opened up the device, curious about what was inside; a relay had failed, basically triggering the starter to not work.Everything was mounted up behind the center console.I would later discover that (on the East Coast anyhow) there is a trade of people who specialize in removing these devices from cars, $200 to $500.As a business person, and someone who has self-financed cars, I wouldn’t do it as a trade, but the whole side of me who likes to know how things work was happy to know I could, and happier yet to have helped a friend for free enjoy her car.
Does running two car batterys make amp and speakers hit harder?
Every one here that answered your question is kind of right. First and foremost, like george said ,you need to perform"The Big Three". This will stabilize your electrical system, and help control voltage drop. I have talked to several electrical engineers, and most agree that a combination of larger batteries along with capacitors will greatly improve transient response. To power this whole system you need a large (HI-OUTPUT) alternator. Imagine if you will, a thoroughbred horse trying to run a race with a donkey's heart. It would not work.This is how I equate most peoples car audio systems. Most people fail to calculate the amount of total amp draw that their system will have before buying. They put to much system in their car for their electrical system to handle. Capacitors are good, but can not produce power. This is where beefy batteries come into play.Batteries produce power, but can not release it instantly.This is where capacitors play their role. Your amplifier ,radio, batteries, and capacitors all need power to operate. This is where your all important (Heart) hi-output alternator comes into play. Just as important is "The Big Three"upgrade with the proper gauge wire. The Big Three will allow more current to pass more freely to your electrical system.I hope i did not ramble, and Ihope I helped.