How to Install a Secondary Fuse Box Quickly and Easily (Car Auxiliary Fuse Box)

Автокөліктер мен көлік құралдары

If you have a ton of accessories (dashcam, gauges, footwell lights, auxiliary electronics etc) and struggle to splice into a power source or find a ground bolt every time you install something new, this mod is for you. This is a simple process that allows quickly and easily connect and disconnect accessories to their own fused power sources with no cutting or splicing required. Watch as I run through how to install a secondary accessory fuse box that runs directly from the battery but does not draw power when the car is off on my Legacy GT. You will need a fuse box, SPST relay, and some lower gauge wire depending on how much power you want to run to the box.
Things I used:
Fuse box - amzn.to/3gj8YF0
SPST relay - amzn.to/2LVYFJ0 (this is a 6 pack but you only need 1. Any brand is good but ensure it has the wire sections and is 12V with high amps)
Useful heatshrink solder connectors - amzn.to/2wPpB8U
As an Amazon Associate I earn from qualifying purchases (but this doesn't cost you anything at all).

Пікірлер: 114

  • @ClaytheBMXer
    @ClaytheBMXer Жыл бұрын

    Not sure if I missed it, but the power feed from the battery to the new fusebox should be fused at the battery at the amperage capacity of the fusebox with the accessories used. If the big positive cable running through the fender gets shorted, or one of the lugs on the box gets shorted (example: an accident), then your battery is directly shorted to ground! Cool video by the way!

  • @petetherealrelentless6542

    @petetherealrelentless6542

    4 ай бұрын

    100%. TBH I found running the wire through the fender a bit harder than it needs to be.. I always go through the firewall grommet.

  • @EZ-viewing.
    @EZ-viewing.3 жыл бұрын

    You’re a very well informed gentleman who does not mind sharing his experience. I’ve been searching for this a very long time. Thank you for your efforts.

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    Much appreciated thank you

  • @coreyblitz2000
    @coreyblitz20007 ай бұрын

    What a man! Gotta love subaru people for always coming in clutch with clear answers for my questions.

  • @nuff8846
    @nuff88462 жыл бұрын

    As someone who's spent at least 100 hours trying to learn this shit from Google, even though I'm a visual learner, thank you. I get tunnel vision and struggle otherwise. So, seriously, I appreciate the video!

  • @malachiclifton8795
    @malachiclifton87952 жыл бұрын

    This is a nice high quality video that was very informative. I appreciate your straight forward explanations paired with your good videography of exactly what you were talking about.

  • @pujolsh8tr
    @pujolsh8tr4 жыл бұрын

    Thanks for the great video. This was exactly what I've been trying to find. A very simple explanation on how to install an extra fuse box for small accessories.

  • @RPGarage

    @RPGarage

    4 жыл бұрын

    Glad it helped!

  • @stephenbrook9085
    @stephenbrook90852 жыл бұрын

    This is excellent advice! I was watching this for my VAG car but i also have a legacy 😅 Thanks this will be great help

  • @blackterminal
    @blackterminal2 жыл бұрын

    Im working on a electric car project and this video was helpful to me for adding a fuse box. Thank you

  • @joemzd
    @joemzd3 жыл бұрын

    I gave you a thumbs up as soon as you corrected yourself from "just as good" to "just as well". Good job!

  • @bradleyhawks8689
    @bradleyhawks8689Ай бұрын

    Very well put together video and easy to understand the info. Thank you!

  • @draftnotion
    @draftnotion3 жыл бұрын

    Great video, I am adding a wideband afr gauge and will do this for the power

  • @sorodaxu-
    @sorodaxu-3 жыл бұрын

    You are a life saver. Thanks I appreciate your time and video. 👍

  • @luiso6827
    @luiso68272 жыл бұрын

    Awesome video! Ppl be sure to use his link in the description to purchase this product as a thank you! Thanks for making this video.

  • @DJLIBERATORE7
    @DJLIBERATORE77 ай бұрын

    Very well done. Thanks for taking the time to do this video!

  • @70MUSTANGMAN
    @70MUSTANGMAN Жыл бұрын

    I appreciate this video! I bought the exact same fuse box off Amazon so this helps!

  • @losrodriguez4212
    @losrodriguez42123 жыл бұрын

    I’ve have been looking for a video to add a fuse box like this without wiring a bunch of relays and had a hard time finding one. Thanks !!

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    Glad it helped!

  • @mjb4ever
    @mjb4ever3 жыл бұрын

    Great explanation and very easy to follow.

  • @dajur1
    @dajur12 жыл бұрын

    Nice video, this is exactly what I was wanting to learn. Thanks! I just wish there was a fuse panel with 2 fuse sections so that I could have constant power on 1 half and ignition power on the other. Well, I guess I'll be buying 2.

  • @joserhdz85
    @joserhdz85 Жыл бұрын

    Thank you so much! Great explanation this is what I needed

  • @tombackes9557
    @tombackes95573 жыл бұрын

    Great and easy to understand video.

  • @johnevans737
    @johnevans7372 жыл бұрын

    Absolutely perfect then I was a technician for Chevrolet for 10 years I know how to replace and repair anything on a vehicle up until 2016 but to be damned I could not figure out how where and why I could put my new fuse box that I added after adding two optimum batteries a 200 amp alternator and multiple accessories like backup camera Android touch screen radio front cameras and plow heated cameras so for when I'm filing and many other items with your simple advice and good ideas I was able to find the perfect spot in my truck where the wires reached easily looked gorgeous and did what I wanted to do thank you so much once the interior is done I'm going to take my beautiful truck which is not so beautiful now to the body shops maybe and turn her into a show truck

  • @michaelmorris6575
    @michaelmorris65752 жыл бұрын

    Great video! Thanks for sharing.

  • @raffie9526
    @raffie95263 жыл бұрын

    Great video !

  • @rameljeferuiz
    @rameljeferuizАй бұрын

    This is so cool, i want to add led lights to my 79 ford

  • @NoSlackZak
    @NoSlackZak Жыл бұрын

    Great video. Thank you.

  • @zachster2016
    @zachster20162 жыл бұрын

    I'm a beginner. As in I watched like 2 other videos before you, so I had a slight understanding of what you're talking about, though I didn't catch what you meant by you led a wire through the fender and then for some reason your new fuse box has its own positive and negative to connect to and then I was confused why you even needed to do any of that when you have an interior fuse box, I've got a lot to learn, hopefully quickly lol

  • @calrs682
    @calrs6828 ай бұрын

    Nice work👍

  • @chrisgraham2904
    @chrisgraham29043 ай бұрын

    You should note that the use of the relay allows the new fuse panel to only have power when the ignition is in the ON position. If you want power at the fuse panel continuously, no relay is required. More importantly, with or without the relay, you need a fuse in the power supply line from the battery. If you using #12 Awg wire off the battery, you need a 30 amp fuse installed as close to the battery as possible to protect that power supply wire from overheating and causing a fire. The wire size off of the battery and the fuse protection will depend upon the total number of amps drawn by the circuits of the panel.

  • @jona3294
    @jona329410 ай бұрын

    Surely when you tap to an accessory that only switches on with ignition (and engine running), you won't need a relay as that is basically your "automatic switch" since the accessory that you tap into ONLY switches on as you turn the key in ignition?

  • @tomskimcdouglegaming806

    @tomskimcdouglegaming806

    4 ай бұрын

    depends on the amperage of the accessory.

  • @rjensen4896
    @rjensen48969 ай бұрын

    Awesome video, thanks for sharing! Quick question: If you don't have any accessory fuse outlets, how could you wire up the triggered positive on the relay? I'm trying to install an extra box on an old car with glass (AGC) fuses.

  • @jd8223
    @jd8223 Жыл бұрын

    What gauge wire did you use to ground the new fuse box to the car? What if you wanted to add a toggle switch to be able to turn the access of controls on and off?

  • @IDABAYAREA650I
    @IDABAYAREA650I Жыл бұрын

    *So if im making a custom interior dome light, if i wire them directly to the fuse block, do i need to add a relay? Id like it to be hot at all times due to being turned off by the original push style button you use to turn it on, like from factory when you open the door the lights come on*

  • @Caza390
    @Caza3907 күн бұрын

    What if you wanted to add multiple ones of these? Second question is what if you wanted something to be a constant?

  • @OscarGonzalez-cw9hm
    @OscarGonzalez-cw9hm4 ай бұрын

    The relay is necessary? Or just a positive source to the new fuse box ?

  • @rodolfomunoz6016
    @rodolfomunoz6016 Жыл бұрын

    hi how mich amp did you use on the fuse tap to the relay? is it 30amp? or what should be

  • @randomname3665
    @randomname366511 ай бұрын

    What’s the difference between putting the negative on the new fuse box to ground or going to the negative on the battery?

  • @AnZ85
    @AnZ852 жыл бұрын

    Hi. I would like to ask. So, from the relay. Red= add on fuse acc box + Blue= from direct 12v battery Black= ground White= main acc fuse which off when the key is off? Am I right?

  • @binaryglitch64
    @binaryglitch647 ай бұрын

    I'm looking for a way to add a fuse receptacle to one of the empty spots in my existing fuse box. Is this a thing? My search only shows fuse tapps and add-on fuse boxes, which are not as clean as what I'm trying to achieve.

  • @jhsubarurepairsandmods8712
    @jhsubarurepairsandmods87124 жыл бұрын

    Nice solution. Is your steering wheel completely wired up for the audio and illumination?

  • @RPGarage

    @RPGarage

    4 жыл бұрын

    kzread.info/dash/bejne/haGp1LtyaaW4oc4.html

  • @rameljeferuiz
    @rameljeferuizАй бұрын

    Excuse the stupid question but what will be the difference Between having a relay and inline fuse

  • @asd67lkj
    @asd67lkj3 жыл бұрын

    Newbie question.....which fuse did you hook into to have power on "Accessory"... PS I have a Toyota Hilux... (Oz) Liked the way you set up so power only come through when you turn the ignition switch on...

  • @UntiI117

    @UntiI117

    3 жыл бұрын

    The best way is usually the radio fuse.

  • @ramilmarbella7559

    @ramilmarbella7559

    3 жыл бұрын

    for me i go on cigarette socket

  • @xobaby3862
    @xobaby38624 жыл бұрын

    ♥️

  • @williamvaladez3149
    @williamvaladez31498 ай бұрын

    Why do you need the relay for??? Can we do it with out the relay

  • @AJFAful
    @AJFAful3 жыл бұрын

    Hi, nice job. What other way would you recommend to achieve the same outcome, but without taping into an accessory power source (Having an independent 12v ignited not constant fusebox).

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    The reason I used the relay and accessory tap is because I don't want the fuse box to stay on when the car is off or it will drain my battery. If you just want an independent 12v source you can just run a positive and negative wire to the battery directly and use a switch mounted inside the cabin somewhere to turn it on and off but you risk forgetting it on when you leave the car. If you do that you just need to put a fuse in the positive line and you're done. Not sure if that's what you meant

  • @AJFAful

    @AJFAful

    3 жыл бұрын

    @@RPGarage Thanks for the fast reply. I do have the same concern as you, I only want the fusebox powered while ignition is on (Acc Position). But I want to achieve this without having to tap into an ACC fuse, I want something else to trigger the relay (if a relay will be used in this hypthetical other setup).

  • @black11189

    @black11189

    2 жыл бұрын

    @@AJFAful one year after what did you do ?

  • @erikpayne8202

    @erikpayne8202

    Жыл бұрын

    @@RPGarage thankie

  • @jesseportillo324
    @jesseportillo3243 жыл бұрын

    Very informative...question. how would you hook a switch to turn on and off the lights 🤔

  • @UntiI117

    @UntiI117

    3 жыл бұрын

    Instead of running the power wire straight to the fuse box. Run the wire to the switch, then to the fuse box

  • @jesseportillo324

    @jesseportillo324

    3 жыл бұрын

    @@UntiI117 sorry. I meant from your diagram ...how would you hook up a rocker switch to it. I assume the switch would have to be connected to the the relay ? Is this correct?

  • @ramilmarbella7559

    @ramilmarbella7559

    3 жыл бұрын

    @@jesseportillo324 dude he connected it the acc by key that means when u turn the ignition on, it should have power...

  • @polosavage1
    @polosavage1 Жыл бұрын

    What if you wanted to hook up a device to a constant power source so that it works with the car is off and on instead of a accessory stores that only works when the car is on

  • @xxxxxGhostBoyxxxxx
    @xxxxxGhostBoyxxxxx Жыл бұрын

    Interesting setup. One question. Why do you need a relay for the secondary fuse box? Can it be attached directly to battery without it?

  • @anonymousperson4363

    @anonymousperson4363

    Жыл бұрын

    To make sure all connected devices are off when the ignition cylinder (switch) is off.

  • @HotSauceIgnited
    @HotSauceIgnited3 жыл бұрын

    Is it alright if the bus bar is grounded back to the battery?

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    No it should not be grounded directly to the battery. Use some part of the frame of the car

  • @AlexT-md9df
    @AlexT-md9df Жыл бұрын

    If you are running from battery to rocker switch to fuse box do you still need a relay? I’d like to run lights even when car is off being able to turn it on with a rocker switch in my car

  • @averyely9741

    @averyely9741

    11 ай бұрын

    I May be wrong, but i think you can run a positive from the battery to the switch, than from the switch to the fuse box. You could then ground it out like normal

  • @JuanGomez-ih3zn
    @JuanGomez-ih3zn Жыл бұрын

    I need to put on my car a New Fuse box Can u do ... Where are u Location???

  • @teresodorado8838
    @teresodorado88383 жыл бұрын

    Great video!!! Only question I have is do I need a relay for each individual accessory? Such as led light bar and or fog lights.

  • @josepreciado5312

    @josepreciado5312

    3 жыл бұрын

    I don think so know that he added the relay on the 2nd fuse box

  • @mirafelizav.hernandez8341

    @mirafelizav.hernandez8341

    3 жыл бұрын

    He only put a relay for the fuse box. So installing accessories such as led bars all you need is find out how much amp does it need for it to power. Not too much amp because it will burn your wire or less amp will blow your fuse. Just the right amount of amp fuse for it. Usually 3led lights will pull 0.02amp. So do the math. Good luck

  • @IProHeadhunter
    @IProHeadhunter3 жыл бұрын

    Did you add an inline fuse between the relay and the battery? If so what amperage

  • @helmkaj

    @helmkaj

    3 жыл бұрын

    Or breaker?

  • @daniellee100

    @daniellee100

    3 жыл бұрын

    Yes, add a fuse the same amperage as the relay between the battery and relay

  • @BigDOOMson

    @BigDOOMson

    3 жыл бұрын

    @@daniellee100 how'd he do that if he got power from the stock fuse box to the relay and then to the new fuse box?

  • @samm.2213
    @samm.22133 жыл бұрын

    Why do you need a relay in line between the battery and auxiliary fuse panel?

  • @rgomez86

    @rgomez86

    3 жыл бұрын

    So your accessories don’t drain your battery if you accidentally leave them on. Turning the car off also removes power from the accessories.

  • @UntiI117

    @UntiI117

    3 жыл бұрын

    Because then whatever you have connected to the fuse box will be on 100% of the time and wont turn off

  • @black11189

    @black11189

    2 жыл бұрын

    @@UntiI117 but if you already turn off the key, that mean there no current on the acc, so the fuse box shouldn't get current ??

  • @UntiI117

    @UntiI117

    2 жыл бұрын

    @@black11189 but the wires to the fuse box are going straight to the battery, so even if the key is off it'll still be powered. So the relay is there to disconnect the circuit when you turn the key off

  • @dptp9lf
    @dptp9lf3 жыл бұрын

    if you have room it's nice to have a switched and unswitched one

  • @the_wilkini
    @the_wilkini Жыл бұрын

    Nice video but I don't agree with using the same colour wire for -ve & +ve connections.

  • @knight3131
    @knight31312 жыл бұрын

    You don't get parasitic drain ? Also can the ground from the fuse box be connected to battery negative or it has to be to the car ?

  • @RPGarage

    @RPGarage

    2 жыл бұрын

    Have you watched the whole video or read comments? All of these questions are answered

  • @shaunmoeller3288
    @shaunmoeller32882 жыл бұрын

    I just had my vehicle stolen... police found it in 2 days no damage was done except they tried to paint it... I was thinking about adding a hidden fuse box inside the vehicle and just pull out a couple relays to prevent the car from being stolen but keeping the original fuse box with all relays and fuses under the hood that way if they did look under the hood and check fuses it would look stock... just not sure how I would hide it in a 96 Cherokee being there's not many hiding spots

  • @bongski1797
    @bongski179729 күн бұрын

    Whats the size of the wires?

  • @twigglykevin
    @twigglykevin3 жыл бұрын

    Adding a relay eliminates "parasitic draw" correct?

  • @twigglykevin

    @twigglykevin

    3 жыл бұрын

    When connected to a switch... Ie ignition

  • @carlossdb2
    @carlossdb23 жыл бұрын

    Where is the inline fuse located on the wire coming out of the battery?

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    I put one on later after the video. Given that the wire that comes from the battery goes to a relay and then everything else is fused, really the only way there would ever be a short is if that wire from the battery somehow contacts the frame but you're right, having one there is best practice.

  • @TheEpicShadow

    @TheEpicShadow

    3 жыл бұрын

    @@RPGarage What size fuse did you run from the battery to the relay?

  • @surfingfire479

    @surfingfire479

    3 жыл бұрын

    I have a 12-way fuse box with a 100amp max output. Would I hook it up just like this? If so, then what type on gauge would I use. I have a relay of 12v 120amp max.

  • @zaheersarwar7815
    @zaheersarwar781510 ай бұрын

    I'm putting an led beacon light in my van, which needs to operate with the ignition off. I won't be using a relay. Won't need it..

  • @georgeowen3506
    @georgeowen3506 Жыл бұрын

    I feel like you are missing a fuse on the relay power feed line.

  • @knight3131
    @knight31312 жыл бұрын

    Wouldn't this cause parasitic drain of the battery ?

  • @BilderbergCEO
    @BilderbergCEO3 жыл бұрын

    Thumbs up for "just as well" :)

  • @joeyweijts2003
    @joeyweijts2003 Жыл бұрын

    My friend please solder connections with an iron those connecting things will melt eventually

  • @RPGarage

    @RPGarage

    Жыл бұрын

    Have you ever seen this happen? I've ran these for years and never had any break or melt.

  • @johnlee1009
    @johnlee10093 жыл бұрын

    Why go through the trouble of routing every ground back to the bus? If the chassis is grounded, why not just ground it wherever? I'm adding a lot to a classic car. There's a lot of exposed metal for ground.

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    If you've got a lot of easy metal in reach to ground to that's completely acceptable. In my car it's annoying to try and find a good ground in different spots hence the ground bus. Easy and reliable, especially for accessories with paired +/- cables

  • @user-dl8se5es3q
    @user-dl8se5es3q9 ай бұрын

    You should not use 12 gauge wire on a block that should take bigger amperage that block is a 100 amp block it should be 10 gauge wire at least

  • @black11189
    @black111892 жыл бұрын

    If it already on the acc why the relay ?

  • @RPGarage

    @RPGarage

    2 жыл бұрын

    So power comes directly from the battery instead of through the ACC fuse

  • @black11189

    @black11189

    2 жыл бұрын

    @@RPGarage but in your case it already on the acc

  • @Adam-gn4oo
    @Adam-gn4oo2 жыл бұрын

    Just to be clear if I wanted the fuse box to always be powered I just wouldn't us a rely correct

  • @RPGarage

    @RPGarage

    2 жыл бұрын

    Correct

  • @Mach1Chriss
    @Mach1Chriss5 ай бұрын

    The Vid was great but my god your index finger nail kept making my stomach upset did you drop something on it .

  • @brennonbourque8899
    @brennonbourque88993 жыл бұрын

    Bro your fingernail.....

  • @fun6243

    @fun6243

    Жыл бұрын

    This you tuber texted me and wants a video on your fingernail.......

  • @joelikesconverse
    @joelikesconverse3 жыл бұрын

    nice video man, but you skipped past a lot of the stuff that would have been helpful to see.

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    Like what?

  • @joelikesconverse

    @joelikesconverse

    3 жыл бұрын

    @@RPGarage all the bits you done when the camera was off.

  • @PBS-nm1uu
    @PBS-nm1uu3 жыл бұрын

    if you really did your homework you will know you used the wrong wire for power.

  • @RPGarage

    @RPGarage

    3 жыл бұрын

    Oh damn. Guess it won't work.

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