Big 3 wire kit install: 2003-2004 SVT Cobra Mustang

[@genericdude6551]

I installed the GP SAE 6 Spot Battery Terminals and I'm trying out the on battery terminal fuses (Blue Sea Systems 2151 Dual MRBF Terminal Fuse Block with a 60A for the audio amplifier and a 150A fuse for the alternator). The on battery terminal fuse block and fuses should be safer than using the inline fuse holder with the pigtail to connect to the battery terminal (chance of it coming loose and shorting out the battery.. Just another option to consider. Too bad I can't post an image of it here.

[@elmemor.7923]

Was having issues with my alternator charging my battery after doing an upgrade on my 03 GT. The Amp upgrade wasnt that much of a difference but I still couldnt figure out what was going on. After watching your video your making my own wire kit, the issue was fixed. Really appriciate the mustang videos. Keep them coming!

[@genericdude6551]

Why not connect the ground to an alternator mounting bolt? It seems that would be electrically the same as the motor mount bolt and would be more accessible.

[@dannyjohnsonsgarage]

The alternator is mounted to an aluminum bracket. It would be better to mount it to the motor mount that is directly connected to the engine block for grounding

[@Shadow_Black_PP1]

hey I really appreciate that video I have a 2003 mustang gt an I'm trying to the big 3 on it I been searching all day to see where was the ground for the engine to chassis I know now thanks alot for the video

[@dannyjohnsonsgarage]

Great! Glad the video helped out. Thanks for watching! Good luck with your projects!

[@Cobra11437]

Scrun Johnson Question bro ... I have an 03 cobra and I recently changed out my alternator and your video helped me out by the way 👍🏽. But I'm still having issues with my volts . I even went back and changed it again and bought a new battery and terminals still battery light turning on and volts drop from 14.7 to 12.5 in like 30mins . Check ground wires all good . Any ideas . Oh and replaced my belt as well . Help

[@lysol7204]

@@Cobra11437 Did you fix this? I got the Same problem, battery light was on and no charging, got a new alternator and battery ligjt turned off but its still not charging, tried a grownd wire directly to a an alternator bolt and nothing....

[@Eddie2425]

For the engine to chassis ground I used that other threaded hole next to the bracket just got another bolt

[@dannyjohnsonsgarage]

Very good. I’m sure there are several places that will all work. A lot is just preference

[@euller35]

Any chance you remember the thread pitch? Was it M12 x 1.75?

[@Filywardo]

You are the man Buddy, Liked and subscribed!!!!! I have been looking EVERYWHERE for a video of the factory ground locations. I completed an Engine Swap and its been a nightmare finding the factory spots in my gravel driveway LOL cheers brother

[@racequad9]

Dumb question Danny, but at 20:47 why the need to reuse the old factory wire? Isn't the new zero gauge replacing it??

[@dannyjohnsonsgarage]

racequad9 Very good question . I had the same question when I was installing and was told by the mechman rep that you can run both and the power will take the route of least resistance, so it will be fine to run both- just as if the big 3 wire had more strands in it

[@racequad9]

Awesome! Thanks as always.

[@209rafita]

But is ok to remove the old power wire n just run the new zero gauge one? U know for cleaner look?

[@modlist6129]

So the original power cable from the alternator to the battery never gets removed correct? You are basically just adding another alternator to battery cable just in 0 gauge wire

[@dannyjohnsonsgarage]

Yes. Current takes the path of least resistance, so now consider it another strand of cable within the zero gauge wire

[@modlist6129]

@@dannyjohnsonsgarage awesome thanks for the reply Danny!

[@ArcadeDude44]

Awesome Danny, thanks man! I can't wait to get my snakes done!

[@dannyjohnsonsgarage]

ArcadeDude44 Nice! Good luck on the install

[@ArcadeDude44]

Thanks, my friend

[@shnoopydoopy6707]

I used alternator bracket as ground to negative battery terminal, then battery terminal to chassis so two wires total. Should this work? I havent started my car yet.

[@dannyjohnsonsgarage]

The alternator bracket would go to the engine, and being a GT or Terminator it would be an iron block, so it’s probably the same as the motor mount

[@shnoopydoopy6707]

@@dannyjohnsonsgarage alright just checking cause this wiring stuff is confusing sometimes. Ur the man Danny.

[@Shadow_Black_PP1]

instead of putting a ground on the motor mount can I run it somewhere else or that would be a good ground for it

[@dannyjohnsonsgarage]

I'm sure you could. I chose the rear motor mount for better access

[@Shadow_Black_PP1]

OK Thanx bro

[@shnoopydoopy6707]

Ok danny so on the ground to battery one, you can leave the factory ground there and add the big 3 kits ground to that motor mount bolt? You dont have to remove the factory ground?

[@dannyjohnsonsgarage]

Correct, you can leave it. It’s just like adding more strands to the new cable. Current always takes the path of least resistance.

[@shnoopydoopy6707]

I'm getting high 15 volts reading from my sct tuner. Is this bad? I have the j2fab standard alternator like 165 amp with the big 3 upgrade kit.

[@dannyjohnsonsgarage]

That’s too high. You should be 13.5-14.5 . I’d contact him and ask if the regulator is working properly

[@racequad9]

is 13.3-13.7 normal once the the car is up to temp for a 160 amp alternator?

[@dannyjohnsonsgarage]

racequad9 Yes. I see a little more than that with my 240 amp, but you don’t want it too high either. It’s a 12V system, so no charging would be 12.

[@racequad9]

awesome. finally got my terminator running and just making sure the readings from my aeroforce gauge were in line with where they need to be. how does 170-175 sound for coolant temp?

[@cobra-svt2004]

hello, I'm trying to connect my mack man alternator but it comes with a blue wire, I do not know where it's going, you have some idea of ​​th

[@209rafita]

Do i really need to install the inline fuse?

[@dannyjohnsonsgarage]

Svt Rafa Yes! Don’t forget it

[@adamhonda98]

Nice

[@Chris-zm7wh]

Would long tubes effect the ground you re located ?

[@dannyjohnsonsgarage]

You’ll have to see how they clearance. Make sure no wires touch the exhaust

[@felixserrano2511]

Thank you for the video, but it seems Mechman has discontinued the Big 3 wire kit. I have 1 question, I’m planning to install a 200A alternator into my 03 cobra, right now the car is stock but I have plans in modify the car in the future, will I need a bigger alternator wire for now or which gauge of wire and lenght will you recommend. I really will appreciate your suggestion and thanks again for the videos very instructive

[@dannyjohnsonsgarage]

You will need it as soon as the 200amp alternator is installed or it could melt wires. You can buy 7’ black and 3’ red and the inline fuse and ends. It can all be purchased through delcity.com

[@felixserrano2511]

@@dannyjohnsonsgarage thank you I will follow your advice stay safe

[@lysol7204]

Any altenate locations up top i could use?

[@dannyjohnsonsgarage]

I believe there is a factory ground near the battery on the fender

[@jessefrias2575]

Is this a specific cable for this upgrade or can i hit up local audio shop and buy the wire there?

[@dannyjohnsonsgarage]

Jesse Frias yeah, I believe it would be fine as long as it's the right gauge. I believe three is an un-oxygenated version that's best

[@baguirre1797]

How much you pay for that

[@dannyjohnsonsgarage]

About $60 but you can find them for $45. www.amazon.com/gp/product/B06Y5J4YPD/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=2004047-20&creative=9325&linkCode=as2&creativeASIN=B06Y5J4YPD&linkId=781522403cc74a9af1b04468037c53e8