Dell 65W charger type c cable cut

Question

Hi Techies,

I have Dell 65W type C charger for Latitude model laptop.

Unfortunately, the type c part is crushed under the work table's leg and broke completely.

I am trying to attach a new type c cable to it but the cables look completely different.

Dell charger has 3 cables out (Blue, Black, White) while a general type c cable has 4 cables (Red, Black, Green, Yellow) - image attached.

I knew there's an E-maker chip on the type c pin which negotiates for voltage/current levels and I believe that any type c cable has.

Could somebody help me in identifying the cables to be connected or any resolution further (rather than not replacing the charger, as it's completely alright).

Thanks
Comrade

ann_droid · Answer

Hi If you have both ends, then you coud splice in a 'middle' bit. That is making 2 joints but you can get it right first time.

Vzoli66 · Answer

Dear comrade7 ! Did You find out, how to do it? ( wich color to wich color?

maksimthuk · Answer

в моєму випадку на новому шнурі було 5 пін, однак гадаю алгоритм такий самий

WonderfulWiz · Answer

Same problem here. Any solution yet?

user_a73c01 · Answer

For Dell laptop charger cords with a center pin connector, the wire colors typically indicate: black for the outer ground (negative), white for the positive (power) pole, and blue for the data/ID pin that communicates the charger's wattage to the laptop. These wires are essential for proper function, with the data pin's absence preventing battery charging, though the laptop may still run.  Wire Color Code Breakdown Black (Negative/Ground): This wire is connected to the outer part of the charging plug, which serves as the electrical ground or negative terminal.  White (Positive/Power): This wire carries the main positive power to the laptop, often at a high voltage like 19.5V.  Blue (Data/ID Pin): This is a crucial communication wire. It transmits a signal that identifies the charger's power output (wattage) to the laptop.  Why This Matters Battery Charging: Without the blue data wire functioning correctly, the laptop may power on, but the battery will not charge.  Safety: Incorrect wiring can be dangerous, so it is not recommended to experiment with the wires.  Dell's Design: The data pin is a proprietary feature from Dell that ensures you use their compatible and expensive power bricks rather than generic chargers.  To Be Sure (for advanced users) For absolute certainty, particularly when modifying chargers or troubleshooting, it is best to use a multimeter to test the voltage and continuity of each wire.  ** this is what google ai says. ANYONE TRIED TO FIX IT? thanks

BobTheBuilderAU · Answer

I’m planning to buy a male and a female USB-C connector. I’ll use the male connector to test the connectivity of the working Dell charger, and then compare it with the wiring on the female connector attached to the broken one to ensure everything is correctly matched. Hope this helps.

(edited)

BobTheBuilderAU · Answer

End up with the cable above from Taobao.com, works perfectly well...

raisahmad · Answer

I am clear on White wire (VCC/+ve) and Black wire (GND/-ve). But not so on Blue wire. If the Blue is D+, does D- go to (GND/-ve)? Thanks.

BobTheBuilderAU · Answer

Hi raisahmad, Thanks for your update. Blue can be ignored or connected to the earth/ground. Hope it helps, Bob

raisahmad · Answer

@BobTheBuilderAU​ Hi, I meant to ask if Blue connects to (D+) and it's the only cable [there is no cable for D- to complete the circuit] then probably, Blue's negative counterpart is already grounded inside the power adapter. If Blue cable is left out, how would the power level negotiations work between the device and power supply? Thanks.

user_a73c01 · Answer

You cannot directly wire a traditional 3-wire Dell barrel charger (White, Black, Blue) to a standard USB Type-C connector pin-for-pin because they use completely different communication protocols. Standard USB-C devices require active USB Power Delivery (PD) negotiation via Configuration Channel (CC) pins to request voltages higher than 5V. In contrast, the Dell blue wire connects to a proprietary Dallas One-Wire ID chip inside the power brick that transmits data at 3.3V or 5V to tell the laptop its wattage. Connecting this blue wire directly to USB-C data pins (D+ or D-) or CC pins will not work and can permanently destroy your laptop or charger.  To safely convert or adapt this power supply, you must use one of the two methods detailed below. 1. The Safe Method: Use a Pre-Made Adapter The most reliable solution is to purchase a commercial barrel-to-USB-C adapter. These adapters contain a built-in emulating circuit board (e-marker/PD trigger) that talks safely to both protocols.  Dell Barrel to USB-C Adapter: Look for a female 7.4mm (or 4.5mm) Dell barrel connector to a male USB Type-C plug. It handles all voltage conversions and handshakes automatically.  2. The DIY Method: Using a USB-C PD Trigger Board If you are splicing a bare USB-C plug onto the cable, you must install a USB-C PD Decoy/Trigger Board (such as a ZY12PDN or similar module) between the Dell wire and the USB-C plug.  Step-by-Step Wiring Diagram Isolate the Blue Wire: Tape off and leave the Blue wire disconnected on the cable side. Leave the Dell ID chip inside the brick; do not route it to the USB-C connector. Connect Input Power: Solder the Dell White wire (+Vout) to the positive input terminal (V+ or IN+) of your PD trigger board. Connect Input Ground: Solder the Dell Black wire (GND) to the negative input terminal (G- or IN-) of your PD trigger board. Configure the Board: Set the physical jumper or button on your PD trigger board to lock the output strictly to 20V (matching Dell's standard 19.5V output).  Connect USB-C Output: Wire the output side of the PD trigger board to your USB-C plug: $V_{BUS}$ (+ve) connects to the USB-C $V_{BUS}$ pins. GND (-ve) connects to the USB-C GND pins. CC1 / CC2 pins must connect to the trigger board's CC lines to signal the laptop. D+ and D- lines are typically left empty on power-only conversions. ⚠️ Critical Safety Warnings Voltage Verification: Dell laptop chargers output 19.5V. Standard USB-C devices start at 5V and will burn out instantly if hit with 19.5V without a proper USB-PD negotiation handshake.  Power Limitations: This DIY setup should only be used to power devices that natively accept 20V USB-PD input (like newer Type-C laptops). Do not plug this modified cable into smartphones or 5V accessories.

BobTheBuilderAU · Answer

@raisahmad  my previous reply to your message is to refer this replacement cable: white +; black -; and the blue is the earth. It has the same color schema as the Dell Charger and works well.

Latitude

Dell 65W charger type c cable cut

1. The Safe Method: Use a Pre-Made Adapter

2. The DIY Method: Using a USB-C PD Trigger Board

Step-by-Step Wiring Diagram

⚠️ Critical Safety Warnings

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