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Amp power to underhood fuse box stud 2

Amp power to underhood fuse box stud 2

Postby domano 68 [OP] » Sep 21 2020, 4:16am

I am having trouble connecting my 4 gauge amp power wire to my battery. The batter is a side post and the bolt that holds the positive power cable does not connect well when adding the amp power cable. Bought a new bolt for the cable but it is too long and the power cable cannot tighten. So, I want to ask if I can connect the amp wire to the Stud #2 location in the fuse panel under the hood. I am planning putting the wire which has a 3/8" terminal onto the stud, then placing a nut over the cable terminal connection and tighten down. Any problems with doing this?

Also, how do you remove the cover to get to this stud? Removing the cover does not expose the studs, you have to pull the cover off. I found a few tabs on the bottom sides but still somewhat difficult to remove the side cover.

Anyone know what size and thread count nut would I need would be great! Thanks in advance!
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Re: Amp power to underhood fuse box stud 2

Postby nealinator » Sep 21 2020, 1:42pm

Here is a thread that may help you with some info: where should I get power for my subwoofer/amp?
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Re: Amp power to underhood fuse box stud 2

Postby silentbravo » Sep 23 2020, 1:38am

My truck may be slightly different, but the Stud #2 is only rated for a 30A MAXI fuse. If you are running 4 AWG you probably want a bigger fuse (I would assume you need more for that large of wire).

To get the plastic cover off, you press down the unlocking tab that is next to the fender/outside of truck, then across from that toward the engine, there are 2 little nubs poking out, you have to stretch the cover over those while lifting up and that's all that holds it down.

There is another option under the cover though, if you look at your fuse box lid it should have all the fuse laid out. There is spot to add a MEGA or MIDI style fuse that ties into the main battery feed of the fuse box. That might work out for you, as you can get a larger fuse size for that. Then the only limit to that wire is the short feed wire from battery to the fuse box, which is like a 4 AWG or 6 AWG.

I wouldn't mess with that except as last resort though, would rather tie directly to battery if possible.
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Re: Amp power to underhood fuse box stud 2

Postby domano 68 [OP] » Sep 23 2020, 3:35am

silentbravo wrote:My truck may be slightly different, but the Stud #2 is only rated for a 30A MAXI fuse. If you are running 4 AWG you probably want a bigger fuse (I would assume you need more for that large of wire).

To get the plastic cover off, you press down the unlocking tab that is next to the fender/outside of truck, then across from that toward the engine, there are 2 little nubs poking out, you have to stretch the cover over those while lifting up and that's all that holds it down.

There is another option under the cover though, if you look at your fuse box lid it should have all the fuse laid out. There is spot to add a MEGA or MIDI style fuse that ties into the main battery feed of the fuse box. That might work out for you, as you can get a larger fuse size for that. Then the only limit to that wire is the short feed wire from battery to the fuse box, which is like a 4 AWG or 6 AWG.

I wouldn't mess with that except as last resort though, would rather tie directly to battery if possible.

Thanks for the response.

So you are saying the 30A fuse will probably get blown since I have an inline 75A fuse on the amp?
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Re: Amp power to underhood fuse box stud 2

Postby nealinator » Sep 23 2020, 3:39am

If your amp requires a 75 amp fuse...then it absolutely will blow the 30 amp one.
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Nealinator's 5.3L 4x4 Z71 All Terrain188,885 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
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Re: Amp power to underhood fuse box stud 2

Postby domano 68 [OP] » Sep 23 2020, 3:45am

nealinator wrote:If your amp requires a 75 amp fuse...then it absolutely will blow the 30 amp one.


Right, just wanted to be sure I was following you. Thanks!
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Re: Amp power to underhood fuse box stud 2

Postby nealinator » Sep 23 2020, 4:28am

Well it was silentbravo with the write up you were asking...I just answered for him. ha
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Nealinator's 5.3L 4x4 Z71 All Terrain188,885 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
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