Tip & How-To about Car Audio & Video

Save your charging,and electrical system when installing a audio amp.

Every one wants the BIG amp,the more powerful,the better right?When installing an audio amp,it is good to install a addition battery,in the trunk, it is the idea place,just ground the battery to the frame or body,to a good know ground,It needs to be a large cable,1/o wire,yeah,that is big,but will keep you from having problems,then run a 1/o positive cable from the aux battery you have just put in the trunk,to the main battery in the vehicle,use a 3/4 heater hose to insulate the positive cable you have just installed.This heater hose will prevent a portion of the cable to be rubbed threw on the insulation of the cable and shorting out.Then install the amp.Now ,for better electrical control over the charging system of the vehicle,you can install a isolator ,to separate the circuit,and still charge the battery up with the vehicles alternator.Install the isolator at the vehicles battery and the positive cable you just ran.The alternator will charge the aux battery,and the vehicles battery,and not affect the running of the vehicles engine,or charging system.Be sure to connect the amp to the aux battery only,and the aux battery needs to be a good strong battery such as a 65 style battery such as for a full size ford crown victoria.These batteries are full of power.There you are,you are ready to thump,and do it safely .You need to install a fuse holder between the positive cable from the aux battery and the isolator,use a max link fuse holder and fuse,and a strong 60 or 80 amp fuse,this will blow into before starting a fire,.

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How to install a kicker pt250bass station in a 99 toyota corolla

Normally these are installed in the trunk and you need a heavy power cable right from the Battery and a good ground. Also run the signal wires from the audio source to the trunk. Good Luck.

Nov 20, 2014 | Cars & Trucks

1 Answer

my 2002 acura tl keeps blowing the radio fuse. I disconnected the 2 accessory plugs and the radio, but the fuse still breaks. Is there anything else on this circuit?

If there was anything else on the circuit, it would not be working, so you can answer that part of the question yourself.
I would suspect that there is a short somewhere in the wiring.  If it's a factory radio, with NO aftermarket audio parts, then this is less likely.  If it's had an add-on amp or has been otherwise altered, look for sloppy wiring and re-run the power lines to the battery, installing an additional fuse between the positive terminal of the battery and the line to the amp or radio.
Look in places where the power wire crosses over metal panels, etc......  Rubbing can cause the short.
My guess is that you have an aftermarket radio and/or amp and that it was installed poorly.  This can cause a fire, so check it out carefully and always carry a fire extinguisher in your trunk.

Jul 08, 2009 | Acura Tl 2002 Stereo/radio Dash...

1 Answer

heavy-duty alternator or not??

Hello howdoiuhhhh,

There's a serious voltage drop somewhere in the wiring. If the voltage went up when you installed a 2nd battery closer to your amp, I would suspect that the power and/or the ground is either not getting a good solid connection or is too small a gauge for it's length, or both. I'd try to find the problem before installing additional batteries or a heavy-duty alternator.

The only time a second battery is useful is if the audio system is to be used with the car off. And then it should be installed with an isolator to keep it from the rest of your car's electrical system.

After you have made sure that your wiring supports the amp and only if your total audio system power is 1200 watts RMS or more, you may need to:
1. Upgrade to a high output alternator
2. Upgrade to a heavy duty deep-cycle battery
3. Upgrade the "Big 3" - that is to replace (or add to) the power wire between the battery and alternator, the ground from the battery to the chassis and the ground strap from the
engine/transmission to the chassis with at least 2 AWG wire and preferbly 1/0.

Hope this helps.

Apr 17, 2009 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

How to install Rockford Fosgate 3sixty.1 to a Toyota factroy head unit?

You will need a line level adaptor to get an audio input for the amp.

A line level adaptor is a device that lets you tap off of your speaker outputs of the radio and it converts that signal into the proper level for an RCA input signal the amplifier uses.

If you are installing the amp in the trunk of the car you can just tap off the speaker outputs of the rear speakers mounted in the trunk. Keep the speaker outputs connected to the speakers, just run an extra set of wires from them to the line level adaptor. It will not take anything away from the speakers sound because it is not a power drain on them.

After that, you just connect the power wires for the amp as you would normally and you also need to run an extra wire from the radio power antenna wire to the remote turn on of the amp, or you can use a wire directly from the battery and connect it thru a switch you would need to connect somewhere around the dash, so you can turn the amp on and off when you need to. The power antenna wire from the radio is best, so you don't need to turn the amp on and off manually. It is easy to forget about turning it off sometimes and that would run doen your battery if the amp is left on over night even with no signal going thru it.

Then connect your speakers to the amp and thats it.

Then big issue is getting an audio signal to the amp and the turn on signal for the amp.

If you need more help let me know,


Aug 08, 2008 | Rockford Fosgate Audio Players & Recorders

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