Computer power cord what are the colors of the wire. I am splicing a positive and a negative wire into a computer power cord. The wires in the computer cord are green, brown and blue. Which color is positive and which negative. Thank You, Jim

Good question, proper wiring is a crucial virtue that needs to be one hundred percent accurate.

Three wires showing from the ceiling lamp fixture harness, positive, negative, and ground.

The negative wire is the white wire,
The Hot wire (positive) is the wire of brighter color than known negative,
220V AC (alternating current) home wiring to(" duplex outlet switch, GFI switch, single/dual pole light switch, lamp fixtures,") the Hot wire or lead, is normally Black, the lighter color, or White is neutral or neggative,
Neutral wire (completes circuit) allows current flow to continue through to other parts of house, Alternating current.

The Ground wire is usually wrapped in green color, or unmarked copper.

The copper wire from the ceiling will need to be grounded to the metal bracket on the new light fixture, a gold or silver screw, sometimes tagged with green, is the proper grounding location, Any place on Metal not attached to ceiling bracket, Ground should be attached to metal on fan,

White wire from Fan is neutral, Negative.
Black wire from Fan is Hot Wire, Positive,
If Blue wire from Fan is Not Manufacture spliced, Meaning no Copper is exposed, Wire is not used, Blue wire is NOT ground,
If Fan has a light, Voltage from Hot Black wire will supply both light and fan functions,

Safety First.
flip off breaker switch to the room fan is being installed.

Doubble Check
Black^Black wire connection is secure.

White^White neutral wire connection is secure.

Ground is fastened securely to metal or wrapped under a screw.

Using splice caps is recomended, The plastic shell encloses the wire connection ensuring No stray copper is exposed, limits possibility of cross wiring.

Google the brand of fan being installed, and Check wire color code, and wiring diagram, Info good to have, and checking twice will only guarantee Lamp Fixture Install Well Done.

(Blue wire may be there for installing multiple ceiling fixtures in a loop circuit, so all controlled by same light switch.)


Enjoy Your New Fan,

Jos
Thoughts&Comments, encouraged [email protected]

2004 Hyundai XG350 Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Red
Car Radio Switched 12v+ Wire: White/Green
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Brown/White
Car Stereo Dimmer Wire: Green
Left Front Speaker Positive Wire (+): Brown/White
Left Front Speaker Negative Wire (-): Black/White
Right Front Speaker Positive Wire (+): Brown/Yellow
Right Front Speaker Negative Wire (-): Black/Yellow
Left Rear Speaker Positive Wire (+): Brown/Red
Left Rear Speaker Negative Wire (-): Black/Red
Right Rear Speaker Positive Wire (+): Brown/White
Right Rear Speaker Negative Wire (-): Black/White

if the pioneers already had the wires in that where solid white&white wid a black stripe you can solid white as positive & white wid black stipe as negative same with other speaker except wires should be solid grey & grey with black stripe wich would be your negative if not the best way to go is wire the darkest factoy wire as negative & the lightest color as positive hope this was helpful

The white lead "insulated" is normally positive, and the bare strand of wires is negative, but keep in mind this is not always the case, use a digital meter to verify.

From an aftermarket head unit the color code will most often conform to the CEA standardized colors.

12V+ Constant - Yellow
12V+ Switched - Red
Ground - Black (sometimes with spade terminal)
Remote - Blue/White (sometimes with slide terminal)
Left Front Speaker Positive - White
Left Front Speaker Negative - White/Black
Right Front Speaker Positive - Gray
Right Front Speaker Negative - Gray/Black
Left Rear Speaker Positive - Green
Left Rear Speaker Negative - Green/Black
Right Rear Speaker Positive - Violet
Right Rear Speaker Negative - Violet/Black

If you are using a vehicle specific wiring harness, simply splice the head unit harness and vehicle specific harnesses together, color-for-color. If you are not using a vehicle specific harness, you need to identify the wire colors used by the vehicle manufacturer. There's many "databases" that have such information, including:

http://www.crutchfield.com
http://www.modifiedlife.com
http://www.the12volt.com

each color is for different rpms
ground a wire to the motors metal body and touch one of the colored wires to a positive wire from the battery to check

There should be three solder points on the jack if it is stereo and two if it is mono. The middle points are the positive and the outer point is the negative. The positive wire from the cord is usually the colored wire and the ground or negative wire is usually the black or bare copper wire. You will probably have two colored wires because of the left and right connections to the headphones.

this might help
1994 Toyota Pickup Car Security Wiring Diagram
Battery Constant 12v+ Positive Wire (+): White And White/Red
Battery Constant 12v+ Positive Wire Location: Ignition Switch Harness
Starter Positive Wire (+): Black
Starter Positive Wire Location: Ignition Switch Harness
Ignition Positive Wire (+): Black/Yellow
Ignition Positive Wire Location: Ignition Switch Harness
Second Ignition Positive Wire (+): Black/Yellow Or Black/Red
Second Ignition Positive Wire Location: Ignition Switch Harness
Accessory Positive Wire (+): Blue/Red
Accessory Positive Wire Location: Ignition Switch Harness
Parking Light Negative Wire (-): Red/Black
Parking Light Negative Wire Location: At Steering Column Harness
Parking Light Positive Wire (+): Green
Parking Light Positive Wire Location: In Drivers Kick Panel
Power Door Lock Negative Wire (-): Blue/White
Power Door Lock Negative Wire Location: At Door Control Relay. The door control relay, is located behind the driver dash speaker.
Power Door Unlock Negative Wire (-): Blue/Yellow
Power Door Unlock Negative Wire Location: At Door Control Relay. The door control relay, is located behind the driver dash speaker.
Door Trigger Negative Wire (-): Black/White Or Black
Door Trigger Negative Wire Location: At 2-Pin Plug, Top Of Fusebox
Domelight Supervision Wire: Use Door Trigger, Requires Relay
Domelight Supervision Wire Location: N/A
Horn Negative Wire (-): Green/Red
Horn Negative Wire Location: At Steering Column Harness
Tachometer Wire Negative Wire (-): Black
Tachometer Wire Negative Wire Location: At Diagnostic Connector. The diagnostic connector, is located on the passenger inner fender near the fuse/relay box.
Brake Light Positive Wire (+): Green/White
Brake Light Positive Wire Location: At Switch Above Brake Pedal
Factory Alarm Disarm Wire (-): N/A
Factory Alarm Disarm Wire Location: N/A
Factory Anti-Theft System: N/A
Factory Anti-Theft System Location: N/A

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http://www.fixya.com/support/r793520-3_prong_4_prong_power_cord_conversion

If the wires on the power are not color coded, the two outer wires are your hot leads. The colors are not representative of positive and negative. RED and BLACK are both HOT (120VAC) lines. Connect one to the RED wire and the other to the BLACK wire at the terminal block. The center wire on a 3-prong plug is your neutral (WHITE - non voltage carrying line) wire at the terminal block. For a three prong configuration, you should also have a grounding strap connected to the neutral which is attached to the appliance frame.

If you have any questions, please let me know. I hope this helps you.