Question about 1991 Volvo 740
Black wires in a harness in auto electrics indicates that it is an earth wire.. as to red which is normally a power wire.
Posted on Oct 13, 2013
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Posted on Jan 02, 2017
SOURCE: Headlight/turn signal problem
RELAY, NOISE SUPPRESION/is 1323592 its black and mounted under the hood on the shock tower, check page 4 and page 16 under LHB230FT in your book(item 464) ? why are you messing with this relay if you have a light problem ? does left turn signal stay on with key off /with parks only /with head lights /both front and back turns or front only? have you removed both frt and back bulbs together and ck voltage in sockets ?/wrong bulbs? i would need more info
Posted on Sep 02, 2008
CLICK HERE for your vehicles full service manual. If you are cutting wires.
Be warned your vehicle has a factory amplifier installed, and needs to be bypassed to hear the speakers if you are just wiring behind the dash.
Metra makes a harness you install on the aftermarket radio, then simply plug into the vehicle's harness.
All the wires are labeled for easy installation.
70-9220 is the metra part number. Click on the number to see an eBay auction.
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Posted on Apr 09, 2009
SOURCE: radio wire colors
1994 Volvo 940 Car Audio Wire Diagram
Car Radio Battery Constant 12v+ Wire: Yellow
Car Radio Accessory Switched 12v+ Wire: Red
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Light Orange
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5 1/4′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Blue/Yellow
Left Front Speaker Negative Wire (-): White
Right Front Speaker Positive Wire (+): Gray/White
Right Front Speaker Negative Wire (-): Gray
Car Audio Rear Speakers Size: 6′ x 9′
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Yellow/Brown
Left Rear Speaker Negative Wire (-): Yellow/Green
Right Rear Speaker Positive Wire (+): Green/Brown
Right Rear Speaker Negative Wire (-): Green
Hope helps (remember rated this) TY for use Fixya.
Posted on Jun 03, 2010
If you want a wiring diagram, the best place to get access to this information is alldatadiy.com. There you can have access to the same information system that I would use if you brought your vehicle to me for repair. The small annual fee is well worth it if you work on your own car.
Other than that, All I know to tell you is to scan your onboard computer system to see if any of the computer modules are reporting any circuit faults - this can possibly tell you what the wire goes to.
It is also possible that the wire is NOT SUPPOSED to be connected to anything. It may be some type of diagnostic connector or it may be a connector that is built-in to the wiring harness, but is for an option or accessory that your vehicle is not equipped with (this is very common).
Posted on May 19, 2012
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