Where can I grab constant +12v under hood

[treehan77]

Where can I get constant power under the hood on my 05 Yukon? Only need less than 5 amps to run an LED light under hood. I know I can get a battery post adapter and get from the battery, but don't wanna wait to order one etc. Looking at the fuse box, there is a "#1 stud" with a plastic "B+" plug thing in it, after removal which had +12v. Looks like I'd add the fuse, but then where do I get the output?

OR how do I remove the cover to the fuse box, since I can see a terminal underneath that is connected to battery? (Obviously ok have the cover off already, I mean to get underneath it)

EDIT: Looks like i will probably just plug a spade onto the hot side of #1 stud, attach a fuse and fish it down and out the bottom. Googling seems to tell me this B+ spot is for trailer accessory power.

 

[M1Gunner]

Anyone of those relays will also have a constant 12v pin

 

[05Single]

Wait to order What? Just grab a ring tongue terminal and add it to the external battery terminal off the block.

Personally mine is wired off a fuse block for my aftermarket amplifier. I have a led light so im not worried about power consumption. And it's only drawing power when hood is up.

 

[treehan77]

Yeah, I know I could do that, but I want mine a little cleaner than that though.

 

[mizzouguy]

I'd pull the cover for the fuse box and use the stud where the battery connects to the panel. Nice and hidden and a true constant 12v.
With the stud #1 being trailer accessory, i'd worry it may only be hot with the key on, as to not kill your truck battery while you have a trailer connected parked.

 

[treehan77]

Yep, That's was my my initial thought and why I posted - asking how to remove the e cover...

 

[mizzouguy]

Once you have the lid off, you can gently pop the surrounding cover off. one plastic clip towards the fender, and two tabs you have to pop it over towards the engine. Then the whole thing lifts off carefully. I actually think you can do it with the lid on, just easier to see to line it back up with it off.
EDIT: The plastic clip is in the bottom of your fuse box picture up there ^^^

 

[inmypassatlife]

Wait to order What? Just grab a ring tongue terminal and add it to the external battery terminal off the block.View attachment 182564 View attachment 182565
Personally mine is wired off a fuse block for my aftermarket amplifier. I have a led light so im not worried about power consumption. And it's only drawing power when hood is up.

Wrap it in loom or techflex and have a really clean oem looking wire run

 

[iamdub]

Why not a fuse tap?

 

[Fless]

Stud #1 on my '04 Hoe is always hot (after I put the fuse in). I have to be careful when towing since it's always sending power to the trailer when the 7-pole is connect, and that can drain the battery if the truck's not running.

You can use a ring terminal on the stud I've highlighted in the pic:

Stud #2 is for the electric trailer brakes.

 

[05Single]

I understand you want a clean look, but you said you didn't want to wait for a post adapter . Plus black wire loom is as clean as it gets. I'm ocd when it comes to making things perfect and have an oem finishing touch to my mods.
But if you want to do all that extra work I say tap into the headlight or brake fuse. Underhood light is small enough it won't put extra current on the fuse.

@ScottyBoy would have the perfect answer for you. He's my go to electrical guy

 

[05Single]

Double post

 

[ScottyBoy]

@ScottyBoy would have the perfect answer for you. He's my go to electrical guy

Just do like @Fless mentioned in his post and grab it at the #1 lug. Just pop off the fuse box housing and you will see the power lugs that you can bolt a ring terminal on to. To remove the fuse box housing, you first need to unbolt the corner fender brace up by the wiper motor. Once you get that off, there are a few tabs on the front and side of the fuse box that you need to pry up to release, and then slide the fuse box housing straight up.

 

[treehan77]

Ah ok unbolt the fender brace that's the answer I was needing g thanks scottyboy