Amplifiers / Head Units / Processors / Electrical

ok so i done some trouble shooting to figure out why im still getting voltage drops, light dimming, and why my subs turn off when i play heavy bass songs, and this is what i came across so today i measured for bad grounds, first i measured the battery with the car off, 12.6volts. secound i measured from the neg side of batt to chassis ground, got 0.01 as a reading on the DMM, so that means mininum resistance which is good right? i turned my car on, turned on the wiper blades front and rear, turned high beams and headlights on, and put my heater on MAX i put my HU to about 26/35 and measured the battery and it never went less than 13volts so with everything still on, i me…

So i went to my local shop and had them do the big 3 for me, yeah i know i should of done it myself lol. Used that Knuconceptz 0 gauge wire. A buddy of mine told me that I will need to add an additional fuse to put between the alternator and the battery, but the shop said that it wasnt needed. I think my alt is like a 130amp on my scion tc, and the extra fuse i bought says 300A. Big 3 helped the voltage a bit, but it still drops right away if im giving a demo or just bumping it loud to the upper 11's. Check the pics here, ImageShack Album - 7 images All i see is the alt to the battery, then the battery to the ground. Is it done right or do i need to add that fuse that i…

Can someone post some pictures of there big three setup and maybe explain to me on how to do it that would be great thank you!

So I am attempting to install my upgraded alternator and big 3 this is a first time for me with both situations. Everyone from here has been super helpful so I was hoping you can bail me out since my car is in pieces. I have currently removed the original alt and put the singer alt in that I purchased. I have not connected any wires yet this is where my confusion has started. I have located my grounding wire from engine to battery and will upgrade it which is one of the big three. Now the other two is where I am getting confused. 1.The alt I purchased from singer has an upgrade to increase my voltage and the device he put on has will not allow me to re attach the two c…

So Shizzzon got my attention with some cheap 4/0 gauge he got. I'm thinking of adding a couple of 4/0 grounds and a couple 4/0 runs from alt to my front batts. I have never worked with the stuff before. I will be upgrading my alt to a 400 amp eventually so I'm trying to plan ahead. Since the length of these runs will be shorter than 6-7 feet will there be any benefit vs 0 gauge? Is there a way to fuse 4/0 wire? Also what lugs do you use for your 4/0 wire the only ones I found have a minimum buy amount of 10?

Hi all Ok this is the problem On the big three the alternator power.... It says to upgrade that... now this is the issue i discovered tracking down my voltage drop... My alternator wire goes from the alt to a fuse box (factory) then from the fuse box to the front battery... now my rear battery taps off the front battery.... all 0/1 guage wire... I changed the wire from the alt to the fuse box to 0/1 So i need to change the fuse box to the bat now to 0/1 OR is just going straight from the alt to the rear battery an option (fused with 200 amps of course)

Here is my progress of the Big 3 on my Sentra. http://i35.tinypic.com/5flyyu.jpg Now here is the stock grounding point for the battery/engine chassis. (That little screw back there) Since it is in the most extremely awkward position, can I instead ground to here with the new cable?

ok ive been looking throught the "big 3" posts and i understand everything except for the block to chassi ground i cant seem to find the stock one on my truck. if i cant get to it what would be the easiest way to do this also would it hurt anything if i ran 2 1/0 from alt + to batt+?

Has anyone done this that could give me some advice? Any explorer within a couple years would be the same.

I'm looking to do the big 3 on my 98 expedition. I was looking at the wiring from alt to batt and there are 2 runs of wire. Both are fused. Either 150 or 175 amp fuses. Am I alright to run wire straight from the amp to the battery? Or should I replace wire from alt to the fuses then fuses to batt? I'd rather leave stock wiring there and then run a 4 or 0ga run straight over. Of course I'd just do the 2 grounds chassis to block, block to batt. Any have experience with a late 90s ford?

i was talkin to my dad about doin the big 3 with an HO alt on my car and he said goin from the alt to the engine would be a problem, cuz the stock wire has to go thru some kinda box, maybe circuitbreaker or fusebox? iono. this is gonna usin 1/0 gauge wire. 1st step of my 3rd system overhaul. thanks for your help pple!

hi, i am wondering is doing the big 3 in 4 guage enough for a 2400 rms system? i know using a thicker wire is better but i would like to use stock type connects and the biggest side terninal battery wire is 4 guage that i can find unless i can find like 2 guage then i might be stuck using 4 guage.

Hey guys... I'm about to do the big 3 in my pontaic g8 and the batter is in the truck.. The alt positive is no problem but I'm trying to work out the engine block ground..... What are my options without putting the wire under the car..... Can I ground the block to the chassis and double up on the chassis grounding points near the battery?

Im getting 2 amp kits from knukonceptz. They are both 0 gauge. One is for my amp wiring and one is for my big 3. One of my questions is when my battery grounds it grouds to the frame and the block. Do i need to replace both? And where should i look for my block ground. Btw i drive a 2004 Isuzu Rodeo 3.5 liter. I run a kicker kx1200.1 and its pushing a kicker L7 15 D2. Any advice would be greatly appreciated.

ok, since fords are a bit**, and the ground and power wire are connected behind the engine, and i would never be able to get them off and back on without taking alot of stuff off, maybe even the engine, can i just cut the original wires, close to where it is connected and just add my new wire to it. Because most people say that if you do the same with an amp it wont make a diffrence, so would it work. nv about clip.

Anyone around Dayton OH know how to change the Big 3 on a car? I do not see how to do it, but maybe someone who knows what they are doing could help me. PM me if you can! There is a Fuse box right off the Positive Terminal that throws me off right away. Then the wire to the Alternator seems to be wired under a plastic cover around the engine. I assume if I do the big 3, all that gets removed from the car? Here are two pics of the Fuse box I am speaking of... http://i20.photobucket.com/albums/b...4/Battery01.jpg http://i20.photobucket.com/albums/b...4/Battery02.jpg And here is a Pic of the Alternator, where it apears the power wire goes up inton that hard plastic cover …

is there a kit for this, or do i just get some 0 or 2 gauge wire off a spool, Sorry, but i know nothing about this

i have a 1999 mazda b2500 pickup. i am about to install a big three upgrade and was inquiring on a ballpark figure of how much wire to buy. I was thinking around 8 feet or so but how much wire did you guys use?? Thanks, Matt Cusack

Hey guys, im going to be using a sae-1200d with stock alt (110amps). I was wondering if i could use the 4gauge wire, or should i definitely use the 0 gauge. Also... What battery terminals do you recommend.

If am using a 2200 watts rms amp (does rated power), will there be a big difference if i use 2 gage wire instead of 0/1 gage wire for the big 3?

I was looking to do a big three this weekend and was wondering how would you do the bir 3 when the battery is in the trunk. Does it take away from the whole idea?

Hi I am wondering if I should do the big 3 even though I'm not replacing my alternator. I have a 2005 Chevy 2500. I dont know my stock alternator's specs but I'm sure it can't be high. Should I do the big 3? I'm going to get either a kinetik 1800 or 2000 to put under my hood and I plan on running about 1200watts rms. If I do the big 3 should I use 4awg or 1/0awg? I don't know but I think 1/0 should be necessary of my alternator is stock.. But I dont know much either lol.

I purchased about 15ft of Kicker Hyperflex 0 gauge to do the BIG 3 and the wire was MUCH bigger than expected. I had never dealt with 0 gague wire up until this point. I attempted the install with the wire but had difficulty due to its large size a tightness of my engine bay in addition to the awkward location of my alternator ('08 Altima 3.5SE). So I was just curious to know if using 4 gauge or 2 gauge wire would be sufficient since it will still be at least twice the size of stock? It will be 100% OFC, none of that aluminum clad stuff. Background info on my system is a Sundown SAE-1000D powering a 12" Havoc and a 4-channel Kenwood eXcelon powering my Ininity Kappa c…

So I have some free time coming up so I figured I would look into running a big 3 just to see if it makes any difference. Few questions... Is welding wire better for the big 3? Does the big three make any difference performance wise? I understand it helps with the dimming of the lights which will be good. If the big 3 works out I am thinking about getting maybe an optima yellow top for under the hood. Slowly trying to build up electrical.

OK I got a charger... how, or can i do the big 3? my battery is mounted in the trunk???