Need to splice two power adapter cords, different color wires

Can someone help me, I haven't been able to figure this one out. Which wires match up?

Here's a pic of what I'm working with.


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I'm guessing one of your power cords is damaged and you are trying to replace it with a good one from another adapter.

On the left adapter BROWN is labeled V+(positive voltage) / this is the RED wire on the right adapter (labeled +)
On the left adapter BLUE is labeled GND (ground) / this is the BLACK wire on the right adapter (labeled -)
On the left and right adapter the white wire is used to communicate information regarding the power adapter to the laptop.

 

Actually I'm trying to make a male-to-male power cable

Thank you for your help, exactly what I needed!

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Can you elaborate? What do you mean by "male to male power cable?" What exactly are you trying to do?

 

And thank you for explaining each match, knowledge is power

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I can't think of any use cases where a male-to-male cable would be needed. Or a case where it's cheaper to build your own cable from two PSUs, rather than buying a cable. But then again, they probably don't sell those cables because there isn't a use case for it.

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The only thing I can think of is perhaps he's trying to power two DC devices (two laptops perhaps) off of one power supply. I wouldn't recommend this.

 

I have an HP TB3 dock and a Dell laptop. The HP cable has a dual tip with the TB3 and the power adapter plug side by side. The ports on my laptop are not situated like this, so I need a male-to-male power and aa separate TB3, which I have. Trying to see if this dock will power my laptop (is rated at 200W, so should be plenty even after considering the power to the other ports

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I think I understand now. Basically you need a power cord to go from the dock to the laptop. Good luck. Let us know how it works out. Not sure if it will work or not. It may provide power to the laptop but you may have issues with the Dell recognizing the dock and perhaps trouble charging the battery.

 

Correct. I made the cable, I just connected it, the laptop shows it is plugged in, but it says "not charging".

Any ideas on how to backdoor that one?

 

Yeah, the key is the white wire. That wire communicates to the laptop as to the adapter's power rating and is required for charging the battery. The circuitry in that dock is not recognized by the Dell laptop so it will disable charging. I'm not aware of any methods to bypass this without using a compatible adapter. You're probably going to have to plug in a Dell power adapter directly to charge the battery, bypassing the dock's power output.

Did you get any power adapter warnings when booting up? There's an option to turn off those warnings in the BIOS.

Besides the power, what data interface is used to connect that dock to the Dell laptop? Can't you use one power adapter for the dock, and the other for the laptop?

 

I did get the power warnings. Oddly enough, I get them sometimes with the Dell adapter plugged in when the dock is also plugged in via the TB3 port (not power adapter). Guess it's getting a minor current via that port or something.

As long as this dock ends up working, I'll just have to purchase another power brick. But, for now, I have 2 1080p monitors working beautifully via the dock, but when I plug a third in directly to the XPS via HDMI, it looks like the Intel drivers start going bonkers, because it disconnects and reconnects that monitor errantly every few minutes or so (with lid closed).