Oil sending unit has a 3-wire Plug with Orange, Gray, and Brown. How do I wire a new plug to these 3 wires ?

Here are the wire colors and their corresponding functions for the three OEM radio plugs in a 1993 Chevy C1500:
Plug A:

• Yellow: Battery
• Red: Ignition
• Black: Ground
• Gray: Illumination
• Brown: Dimmer
• Light Green: Left Front Speaker (+)
• Tan: Left Front Speaker (-)
• Dark Green: Right Front Speaker (+)
• Light Blue: Right Front Speaker (-)

Plug B:

• Orange: Constant 12V+
• Yellow: Switched 12V+
• Black: Ground
• Gray: Illumination
• Brown: Dimmer
• Light Green: Left Rear Speaker (+)
• Dark Green: Left Rear Speaker (-)
• Brown/White: Right Rear Speaker (+)
• Yellow/Black: Right Rear Speaker (-)

Plug C:

• White: Left Rear Speaker (+)
• Gray: Left Rear Speaker (-)
• Purple: Right Rear Speaker (+)
• Green: Right Rear Speaker (-)

Note that the wire colors may vary slightly depending on the specific year and model of the vehicle, as well as any modifications that may have been made to the wiring harness. Also, keep in mind that it's important to properly match the wires from the harness to those on the radio to ensure proper functionality and avoid damaging the radio or other components in the vehicle.

2006 Dodge Dakota Car Stereo Wiring Guide
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox for switched power.
Car Radio Ground Wire: Black
Left Front Speaker Positive Wire (+): Dark Green
Left Front Speaker Negative Wire (-): Dark Green/Brown
Right Front Speaker Positive Wire (+): Gray
Right Front Speaker Negative Wire (-): Gray/Brown
Left Rear Speaker Positive Wire (+): Dark Green/Dark Blue
Left Rear Speaker Negative Wire (-): Dark Green/Orange
Right Rear Speaker Positive Wire (+): Gray/Dark Blue
Right Rear Speaker Negative Wire (-): Gray/Orange

Item12 VoltsSecond 12 VoltsStarterSecond StarterIgnitionSecond IgnitionThird IgnitionAccessorySecond AccessoryThird AccessoryKeysenseData BusCan Bus HighCan Bus LowCan Bus SwPower LockPower UnlockLock MotorDriver Unlock MotorPassenger Unlock MotorParking Lights (-)Parking Lights (+)HazardsTurn Signal (Left)Turn Signal (Right)HeadlightAutoLightsReverse LightLeft Front Door TriggerRight Front Door TriggerLeft Rear Door TriggerRight Rear Door TriggerDome SupervisionTrunk/Hatch PinRear Glass PinHood PinTrunk/Hatch ReleaseTrunk Release MotorFuel Door ReleasePower Sliding Door (Left)Power Sliding Door (Right)Factory Alarm ArmFactory Alarm DisarmDisarm No UnlockTrunk Alarm ShuntTachometerWait to StartNeutral SafetyClutch PedalFuel PumpRear DefrosterMirror DefrosterLeft Front Heated SeatRight Front Heated SeatSpeed SenseBrake WireParking BrakeHorn TriggerWipersLeft Front Window (Up/Down)Right Front Window (Up/Down)Left Rear Window (Up/Down)Right Rear Window (Up/Down)Sun Roof (Open/Close)Sun Roof (Limit/Close)Memory Seat 1Memory Seat 2Memory Seat 3Radio 12VRadio GroundRadio IgnitionRadio IlluminationFactory Amp Turn-onPower AntennaLeft Front Speaker (+/-)Right Front Speaker (+/-)Left Rear Speaker (+/-)Right Rear Speaker (+/-)Center Channel (+/-)Subwoofer (+/-)Aux. Audio Input Left (+/-)Aux. Audio Input Right (+/-)RSE Video (+/-)RSE Audio Left (+/-)RSE Audio Right (+/-)Satellite Radio 12 VoltsSatellite Radio GroundSatellite Radio IgnitionSatellite Radio AntennaSatellite Audio Left (+/-)Satellite Audio Right (+/-)HeadunitLeft Front SpeakerLeft Front TweeterRight Front SpeakerRight Front TweeterLeft Rear SpeakerLeft Rear TweeterRight Rear SpeakerRight Rear TweeterCenter ChannelSubwooferLeft Front HeadrestRight Front HeadrestLeft Rear HeadrestRight Rear HeadrestSatellite Radio TunerWire Colorred/black (60A), red/black (60A)red/white (x4) (15A each)purple (for starter kill only)pink/black (resistor code), white (5V reference)pinkN/AN/Abrown or yellowsame as second starterN/Asame as second starterdk. green (low speed GMLAN)tan/black (high speed GMLAN)tan (high speed GMLAN)dk. green (low speed GMLAN)use Directed interface modulesee power lockgraypurpletanlt. bluebrown (L), brown (R)whitelt. blue/white (F); yellow or yellow/black (R)dk. blue/white (F); dk. green or dk. green/wht (R)whitedk. green (ground to turn off autolights)dk. bluegray/black (ajar), tan (open)black/white or tan/whitelt. blue/blacklt. green/blackgraypink/blacksame as trunk/hatch pinpink/blackgray (liftgate), pink (liftglass) (rear handle sw)lt. blue (liftgate)N/AN/AN/Aarms on lock with door openlt. green (driver door key cylinder)Passkey and ignitionN/ANOT pinkN/AN/AN/Adk. green/whitepurpleorange or black (L), orange or black (R)dk. blue (back and cushion)dk. blue (back and cushion)dk. green/white (some models only)lt. blue/white (functions with ignition on only)lt. bluetangraydk. blue - browndk. blue - browndk. blue - browndk. blue - brownbrown - org or lt. blu (function with ign on only)N/Aorangesame as memory seat 1N/Ared/whiteblack(low speed GMLAN)yellow (dimmer)same as power antenna (some models only)whitetan - gray or tan - dk. greenlt. green - dk. green or lt. green/white - org/blkbrown - yellow or brown/white - browndk. blue - lt. blue or dk. blue - tandk. blue - orange (with surround)white - pink (with surround)yellow - (bare wire)white - (bare wire)dk. green - white/blacklt. blue - purplewhite - purplered/whiteblack(low speed GMLAN)(coaxial cable)brown/white - tan/whitedk. green/white - graydouble DIN6.56.55.255.25Polarity++++9.6K ohms+++6.3K ohmsdatadatadatadata5 wire5 wire5 wire-+-++--+----+---+-ac+reverse+ latched--ac+--+AAAA-+2.26Kohms+4.26Kohms+-+++,-+,-+,-+,-+,-+,-+,-+,-+,-+,-+,-+-+,-+,-Wire Locationdash fuse box, black 40 pin plug (X1), pins F1 and E3BCM, black plug, pins 1, 2, 3, and 4starter or underhood fuse box, blk 50 pin plug (X2), pin F1 or F5ignition switch or BCM, lt. green plug, pins 2 and 4ignition switch or BCM, lt. green plug, pin 14ignition switch or BCM, lt. green plug, pin 21PASS-Key III+ Module, black 5 pin plug, pin 4data link connector, black 16 pin plug, pin 6data link connector, black 16 pin plug, pin 14data link conn, black 16 pin plug, pin 1 or BCM, lt. blue plug, pin 10driver kick or dash fuse box, black 14 pin plug (X3), pin B4driver window switch, brown 16 pin plug, pin 8driver kick or dash fuse box, black 14 pin plug (X3), pin B1headlight switch or BCM, white plug, pin 8underhood fuse box, black 30 pin plug (X3), pins A7 and F7hazard switch or BCM, lt. green plug, pin 19BCM, brown plug, pins 4 and 1BCM, black plug, pin 5; brown plug, pin 2headlight switch or BCM, white plug, pin 12headlight switch or BCM, white plug, pin 17BCM, white plug, pin 22driver window switch, brown 16 pin plug, pins 13 and 11passenger window switch, brown 16 pin plug, pin 13BCM, pink plug, pin 15BCM, pink plug, pin 14BCM, white plug, pin 5BCM, pink plug, pin 12hood switch or BCM, black plug, pin 17BCM, pink plug, pins 13 and 24passenger kick, harness to reardriver window switch, brown 16 pin plug, pin 4any fuel injectorECM, black 73 pin plug (X1), pin 50driver kick, harness to reardriver and passenger window switch, black 10 pin plug, pin 7driver window switch, gray 14 pin plug, pin 6passenger window switch, gray 14 pin plug, pin 6EBCM, blk 38 pin plug, pin 11 or 32 or radio, brn 16 pin plug, pin 5brake switch or BCM, brown plug, pin 6parking brake switch or BCM, brown plug, pin 16horn switch or BCM, brown plug, pin 18BCM, brown plug, pin 20driver window switch, black 6 pin plug, pins 3 and 1passenger window switch, black 6 pin plug, pins 3 and 1left rear window switch, black 8 pin plug, pins E and Hright rear window switch, black 8 pin plug, pins E and Hsunroof switch, black 8 pin plug, pins 6 and 4driver window switch, gray 14 pin plug, pin 5radio, black 14 pin plug, pin 1radio, black 14 pin plug, pin 8radio, black 14 pin plug, pin 7radio, black 14 pin plug, pin 6radio, black 14 pin plug, pins 2 and 9radio, black 14 pin plug, pins 3 and 10radio, black 16 pin plug, pins 5 and 13radio, black 16 pin plug, pins 6 and 14radio, brown 16 pin plug, pins 3 and 11radio, brown 16 pin plug, pins 4 and 12radio, gray 16 pin plug, pins 1 and 9radio, gray 16 pin plug, pins 2 and 9radio, gray 16 pin plug, pins 7 and 15radio, gray 16 pin plug, pins 3 and 11radio, gray 16 pin plug, pins 4 and 11Digital Radio Receiver, black 16 pin plug, pin 16Digital Radio Receiver, black 16 pin plug, pin 9Digital Radio Receiver, blk 16 pin plug, pins 2, 1Digital Radio Receiver, blk 16 pin plug, pins 3, 4center of dashleft front doorleft front pillarright front doorright front pillarleft rear doorleft rear pillarright rear doorright rear pillartop center of dashunder front of center consoleunder passenger dash, behind glove boxPhotoNote

12V CONSTANT WIRE RED and PINK/BLACK Ignition harness
12V IGNITION WIRE DARK BLUE Ignition harness
12V ACCESSORY WIRE BLACK/ORANGE Ignition harness
STARTER WIRE YELLOW Ignition harness
PARKING LIGHTS (+) BLACK/YELLOW At Headlight switch
POWER DOOR LOCK (5-wire reverse polarity) ORANGE/PURPLE Harness Coming Into Vehicle From Driver's
Door
POWER DOOR UNLOCK (5-wire reverse
polarity)
PINK/PURPLE Harness Coming Into Vehicle From Driver's
Door
DOOR TRIGGER (-) YELLOW/BLACK At Headlight Switch
DOMELIGHT SUPERVISION (-) Use door trigger
TRUNK TRIGGER (-) GRAY/BLACK At Light In Trunk
TACHOMETER WIRE TAN/BLUE or BLACK/GRAY At Ignition Coil
BRAKE WIRE (+) WHITE/BROWN At Brake Pedal Switch
HORN TRIGGER (-) BLACK/RED Harness Coming From Steering Wheel At
Column
CAUTION! SRS airbag wires are not enclosed in protective loom at the steering column. They are a twisted pair of wires that run with rest of
ignition harness. Be careful not to cut or probe these wires.

Radio:

(Black plug)
Rear Right speaker -: Blue w/White stripe
Rear Left speaker -: Brown w/Yellow stripe
Front Right +: Purple
Front Left +: Dark Green
Rear Right speaker +: Blue w/Orange Stripe
Rear Left speaker +: Brown w/Blue Stripe
Power Antenna/Amp: White
(Gray Plug)
+12v battery wire: Pink or Pink w/White Stripe
+12v Ignition wire: Red w/ White Stripe
Front Right speaker -: Blue w/ Red Stripe
Front Left speaker -: Brown w/ Red Stripe

For 2001 Buick Century Car Radio Stereo Audio Wiring Diagram...

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue


Hope helps (remember to rate this answer).

1998 Chevrolet Malibu Car Stereo Wiring Diagram

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4? x 6?
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6? x 9?
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Hope this helps (remember to rate this).

Stereo Wiring
Constant 12V ..................................................Orange Switched 12V ................................................. Yellow Ground Black Illumination.....................................................Gray Dimmer............................................................Brown Front Speakers 6 1/2" Doors Left Front ( ).......................................................Tan Left Front (-)........................................................Gray Right Front ( )......................................................Light Green Right Front (-).......................................................Dark Green Rear Speakers 6 1/2" Rear Doors Left Rear ( )...........................................................Brown Left Rear (-)............................................................Yellow Right Rear ( )..........................................................Dark Blue Right Rear (-)...........................................................Light Blue
First of all, the Bose amplifier needs to be activated when the after-market head unit is turned on. This is done by connecting a activation wire (often called a "remote" wire) in the factory radio plug. Usually this is a dark green or orange wire in the main radio plug, but in Onstar-equipped vehicles, the remote wire may be pink or orange in the smaller, secondary plug. In either case, the wire must be connected to the blue/white remote output from your new head unit, in order for the Bose amplifier to turn on.

BLACK - GROUND (-12v)
YELLOW - IGN (+12v WHEN CAR IS ON)
ORANGE - MEMORY (+ 12v ALWAYS ON)
GRAY - BACKLIGHT (ON WITH DASH LIGHTS)
BROWN - DIMMER
PINK - POWER ANTENNA (MAY NOT BE THERE)
LIGHT GREEN/DARK GREEN - RIGHT FRONT SPEAKER +/-
TAN/GRAY - LEFT FRONT SPEAKER +/-
DARK BLUE/LIGHT BLUE - RIGHT REAR SPEAKER +/-
BROWN/YELLOW - LEFT REAR SPEAKER +/-

Use a voltmeter or test light to tell the difference between the gray dash light wire and gray speaker wire, and yellow power wire and yellow speaker wire.

Hi there,

The stock amp (mounted inside the sub enclosure) found on the RHS of the boot behind the pull out pannel has a red plug with 8 twisted pairs of wires and 3 other wires (pos, acc and earth).

Out of the twisted pairs you will have

RHS Rear Speaker: Blue/Gray +, Gray/Blue -
LHS Rear Speaker: Red/Gray +, Gray/Red -

You will also have a pair of White/Blue and Brown/White which is the RHS input and a White/Red Brown/White pair for the LHS input. Although... the stock amp uses a common earth input as you will see, the two Brown/White wires going into the same plug.

To put in another amp, you will need one with 'high level' input. Make sure it can take a common ground type input. If it cannot then just use a "high level to RCA" converter.

If you are putting in an after market headunit like i did, then you will just need to separate the two brown/white wires at both ends. If you do this you will need to test which brown/white wire at the head unit end is paired with which wire at the amp end. They are twisted together at the amp end but not at the headunit end (unless you cut the cloth tape back far enough).

MOST GM Vehicles P o w e r Memory (+12v Constant) - Orange or Red Ignition (+12v Switched) -  Yellow Ground (-) - Black Illumination - Gray Dimmer - Brown Power Antenna  - Pink or blue
S p e a k e r s Right Front (+) Light Green Right Front (-) Dark Green Left Front (+) Tan Left Front (-) Gray Right Rear (+) Dark Blue Right Rear (-) Light Blue Left Rear (+) Brown Left Rear (-) Yellow