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How To Wire To A Switched Fuse In My Fuse Box?


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Let's just start by saying I hate wiring. I usually get my buddy to wire up my stereos and accessories, but he's moving, so it's up to me. I have a cheap backup camera that I was to install in my 2006 GMC 2500 CrewCab Duramax. I can figure out how to splice the camera into the reverse light wireat the back of the truck, but I have to wire up power to the screen from a switched (only on when the ignition is on) fuse in my fuse panel (and the other wire to a ground). What do I need for this and what do I need to do so that I do it correctly and don't burn my truck down? Give it to me step by step, like wiring for dummies.

 

Thanks

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You said your buddy wired up stereos for you in the past. Do you have an aftermarket radio in your truck now? If so, this would be the easiest place to get the power and ground. If it is an aftermarket, you can connect the switched wire to the red wire in the aftermarket stereo harness and the ground to the black wire.

 

If this is not an option (if there is no aftermarket radio then there is not a 12v switched behind the radio) then you can go to your fuse box. Use your multimeter or test light to find a fuse that is 15+ amps that switches on and off with the truck's ignition. Pull the fuse and wrap the stripped end of your switched wire around one of the posts on the fuse and then stick the fuse back in the socket. You can get a piece of hardware called a "fuse tap" that you crimp onto the wire then hooks on the post if you want but I find that putting the wire directly on the fuse works best. Then crimp a ring terminal on to the ground and use a self tapping sheetmetal screw to fasten it to a clean piece of metal in the vehicle. You should test the metal to make sure that it is a good grounding point but I find that fastening to the body behind the drivers kick plate works well...

 

Don't worry about frying your truck just make sure that you tape any exposed wires that you strip them.... Good Luck.

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Like somebody said above, you can use the SEO plug (located next to the trailer brake controller plug) in the MBEC to get always hot (30 Amp), run/start (15A), or accessory/run (15A) +12V. I ordered the Delphi female pins along with a Delphi/Packard plastic connector for the MBEC for under $10 from the internet. If your interested in this idea, I can lookup the part numbers and website I ordered them from. It wont look half assed or rigged like tapping an already used fuse.

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Like somebody said above, you can use the SEO plug (located next to the trailer brake controller plug) in the MBEC to get always hot (30 Amp), run/start (15A), or accessory/run (15A) +12V. I ordered the Delphi female pins along with a Delphi/Packard plastic connector for the MBEC for under $10 from the internet. If your interested in this idea, I can lookup the part numbers and website I ordered them from. It wont look half assed or rigged like tapping an already used fuse.

 

First off, if you read the guys post he says that he is not too familiar with or comfortable with wiring so something complex as you are suggesting will not work for him. While tapping a fuse is not the "Ideal" way to hook up an accessory, if it is done properly it will neither be nor look "half assed" or "rigged" and will be the easiest and safest way for a novice to hook up this device.

 

Thank you very much.....

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The method I described is no more complex than installing a fuse tap. In fact, you will need to make as many (or more) crimps with a fuse tap than by using the SEO plug. There is also a ground pin in the SEO connector, so both wires could be run to the same place, with no drilling into the body. The MBEC is also located about the same distance from the radio in the drivers side floorboard as the in-cab fuse box is. Why not route the wires there?

 

A fuse tap does look half assed and rigged. You suggested he wrap bare wire around the leg of a fuse. What do you suppose we call that? It sure as hell aint professional looking or the most reliable way. I think what I suggested is rather easy. If I wanted to make things somewhat complicated, I would suggest he go as far as soldering his connections, using heatshrink tubing, ect. I am guessing he is going to use scotch-loc connectors and buttsplices to connect everything, which is also a lazy way to wire things. I'm not a pro at soldering connections, but I've gotten pretty good with a little practice. If you want your install to look somewhat factory and be reliable and safe (as he did say he doesn't want to burn his truck down), I would suggest doing it my way. Call it what you want, but tapping a fuse like that is half assed to me.

 

"Thank you very much" :crazy:

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  • 3 weeks later...

Rebelman, I've stumbled onto this post while searching for an accessory wire setup for my aftermarket Pioneer AVH-P4200. Is the method you're suggesting safe to hook my accessory wire from the radio to the SEO plug?

 

I am a bit of a wiring idiot (don't even know how to sodder) but I imagine I can find this fuse easy enough. I purchased a couple add-a-circuit fuses from Autozone, can I use those in the SEO?

 

I'm not really sure how to identify the Accessory/Run (15A) +12V you referenced. Do you mean there are 3 seperate fuses underneath the SEO cap in the MBEC and one will be labeled accessory/run? I'm looking at my owners manual and the only descriptors for the SEO written in the owners manual are:

 

"SEO (D)

6-WAY

(A) BLK"

 

I'm sorry to be so ignorant, any help and direction would be extremely appreciated, pictures (which I'm having the hardest time finding online) would be great.

 

TIA!

 

BBSS

 

Like somebody said above, you can use the SEO plug (located next to the trailer brake controller plug) in the MBEC to get always hot (30 Amp), run/start (15A), or accessory/run (15A) +12V. I ordered the Delphi female pins along with a Delphi/Packard plastic connector for the MBEC for under $10 from the internet. If your interested in this idea, I can lookup the part numbers and website I ordered them from. It wont look half assed or rigged like tapping an already used fuse.
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Rebelman, I've stumbled onto this post while searching for an accessory wire setup for my aftermarket Pioneer AVH-P4200. Is the method you're suggesting safe to hook my accessory wire from the radio to the SEO plug?

 

I am a bit of a wiring idiot (don't even know how to sodder) but I imagine I can find this fuse easy enough. I purchased a couple add-a-circuit fuses from Autozone, can I use those in the SEO?

 

I'm not really sure how to identify the Accessory/Run (15A) +12V you referenced. Do you mean there are 3 seperate fuses underneath the SEO cap in the MBEC and one will be labeled accessory/run? I'm looking at my owners manual and the only descriptors for the SEO written in the owners manual are:

 

"SEO (D)

6-WAY

(A) BLK"

 

I'm sorry to be so ignorant, any help and direction would be extremely appreciated, pictures (which I'm having the hardest time finding online) would be great.

 

TIA!

 

BBSS

 

Like somebody said above, you can use the SEO plug (located next to the trailer brake controller plug) in the MBEC to get always hot (30 Amp), run/start (15A), or accessory/run (15A) +12V. I ordered the Delphi female pins along with a Delphi/Packard plastic connector for the MBEC for under $10 from the internet. If your interested in this idea, I can lookup the part numbers and website I ordered them from. It wont look half assed or rigged like tapping an already used fuse.

 

 

This thread I just put together should help: GTM800 Retained Accessory Power (99-2007 Classic)

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How about using the method shown in this thread for separating the bed light wiring from the interior lights? The hardware should work out the same, although the installation location (circuit) might be different.

 

http://www.gm-trucks.com/forums/index.php?showtopic=107730

 

It's tough to loose an "expert" helper.

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The method I described is no more complex than installing a fuse tap. In fact, you will need to make as many (or more) crimps with a fuse tap than by using the SEO plug. There is also a ground pin in the SEO connector, so both wires could be run to the same place, with no drilling into the body. The MBEC is also located about the same distance from the radio in the drivers side floorboard as the in-cab fuse box is. Why not route the wires there?

 

A fuse tap does look half assed and rigged. You suggested he wrap bare wire around the leg of a fuse. What do you suppose we call that? It sure as hell aint professional looking or the most reliable way. I think what I suggested is rather easy. If I wanted to make things somewhat complicated, I would suggest he go as far as soldering his connections, using heatshrink tubing, ect. I am guessing he is going to use scotch-loc connectors and buttsplices to connect everything, which is also a lazy way to wire things. I'm not a pro at soldering connections, but I've gotten pretty good with a little practice. If you want your install to look somewhat factory and be reliable and safe (as he did say he doesn't want to burn his truck down), I would suggest doing it my way. Call it what you want, but tapping a fuse like that is half assed to me.

 

"Thank you very much" :P

 

 

X2

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The method I described is no more complex than installing a fuse tap. In fact, you will need to make as many (or more) crimps with a fuse tap than by using the SEO plug. There is also a ground pin in the SEO connector, so both wires could be run to the same place, with no drilling into the body. The MBEC is also located about the same distance from the radio in the drivers side floorboard as the in-cab fuse box is. Why not route the wires there?

 

A fuse tap does look half assed and rigged. You suggested he wrap bare wire around the leg of a fuse. What do you suppose we call that? It sure as hell aint professional looking or the most reliable way. I think what I suggested is rather easy. If I wanted to make things somewhat complicated, I would suggest he go as far as soldering his connections, using heatshrink tubing, ect. I am guessing he is going to use scotch-loc connectors and buttsplices to connect everything, which is also a lazy way to wire things. I'm not a pro at soldering connections, but I've gotten pretty good with a little practice. If you want your install to look somewhat factory and be reliable and safe (as he did say he doesn't want to burn his truck down), I would suggest doing it my way. Call it what you want, but tapping a fuse like that is half assed to me.

 

"Thank you very much" :lol:

:P

 

I would love to see how the OP made out with your suggestion.....

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  • 2 weeks later...

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