I have just purchased this radio and it has two red wires for power. One red wire has a black marking but both wires have fuse holders on them. I am assuming the red with the black marking is negative and the straight red wire is Positive when connecting in a car. What is throwing me is that they both have inline fuse holders on them. Also the main unit has a metal mounting frame which may be the earth. Can you please tell me if I have the wiring correct with what I have said above. Thanks.
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Factory or aftermarket? Check fuses (should be 2 usually one marked radio and one marked either cigar lighter or interior lights. If aftermarket make sure you have 12v on the memory wire (usually yellow) and ignition switched wire (usually red) as well as good ground on the usually black wire. If so then disconnect for a few minutes to reset
the only 2 wires you dont want to cross are red and black . once you have red from radio red from harness, black from radio black from harness connected it should light up ..the speaker wires can be "trial and error" . if red and black together dosent light it up check the fuse on the radio and on incoming red wire. try bringing 2 wires straight from the battery with a fuse between the red one to radio,if it dosent light up then with "direct power " then the radio needs to come apart to see ether internal fuse or burnt our circuit. ps: sometimes you only need to connect the red "live" wire and touch the black on the casing of the radio to test for life.
Sometimes this happens. Because a fuse blew. For a radio, sometimes in the red wire going to the radio is a black cylindrical fuse holder. Check for that. Or even in the fuse box is a separate fuse for the radio. Just check if the radio gets the 12 volt. If it is getting the power, there could be something defect in the radio. But that would be more difficult to pinpoint, without having the radio on my desk.
Yes the battery can be effected (drain) but in any kind of weather, unless you turn the radio off when you turn the engine off. The power wire in either application is connected directly to the battery as opposed to being connected to the ACC terminal which will be switched on and off with the ignition. You should connect the power wire (should be RED in color) from the radio plug to the terminal (marked "acc") on your fuse box located somewhere under your dash board. It sounds as though it's possible that the RED power wire and the YELLOW "Memory" wire have been switched, the power wire should be switched with the ignition and the Memory wire should be connected directly to a Battery terminal (marked as Batt also on the fuse box) or to the battery itself. All of these wires should be labeled with a small tab indicating there connection. Example Red wire marked (+ poss power), Black wire (- Neg Ground) Yellow wire (Memory) and usually 2 Green, 2Grey, 2 Blue, 2Purple as for the Speakers Poss. & Neg. respectively.
Confirm this wiring for 2000 Nissan Altima Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Pink
Radio Switched 12V+ Wire: Blue
Radio Ground Wire: Chassis
Radio Illumination Wire: Red/Green
Radio Dimmer Wire: Red/Yellow
Radio Power Antenna Trigger Wire: Green/White
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 4′ x 6′ Speakers
Front Speakers Location: Doors
Left Front Speaker Wire (+): Brown
Left Front Speaker Wire (-): Black/Red
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Black/Yellow
Rear Speakers Size: 6 1/2′ Speakers
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Orange
Left Rear Speaker Wire (-): Black/Pink
Right Rear Speaker Wire (+): Blue
Right Rear Speaker Wire (-): Black/White
Below is the color code for your factory radio wires.
The problem you have is that the red wire with the black stripe has likely been shorted and the fuse burned. Take the radio out and find that wire. Make sure it is not being used and tape the end with electrical tape. If that wire was used to power the radio, change the radio power to use the yellow wire with the red stripe. Also make sure the red wire isn't getting pinched when you reinstall the radio. Find and replace the burned fuse and you should be OK. Please get back to me if you have more questions.
Radio Constant 12V+ Wire: Blue/White Radio Switched 12V+ Wire: Yellow/Red Radio Ground Wire: Black Radio Illumination Wire: Red/Black Radio Dimmer Wire: n/a Front Speaker Size and Location: 6 1/2? Doors Left Front Speaker Wire (+): Blue Left Front Speaker Wire (-): Gray/Black Right Front Speaker Wire (+): Red/Green Right Front Speaker Wire (-): Brown/Black Rear Speaker Size and Location: 6? x 9? Rear Deck Left Rear Speaker Wire (+): Blue/Yellow Left Rear Speaker Wire (-): Gray/White Right Rear Speaker Wire (+): Red/Yellow Right Rear Speaker Wire (-): Brown/White
Offhand on most car radio, the yellow wire should be connected to an always on B+12 source (such as the one connected to the + terminal of the battery); the red would be connected to an ACC B+12 such as the a wire from the IGN switch and of course the black to the GND. A fuse would be inline on either or both the yellow and red. The fuse holder would look like a tubular lump along the wiring sometimes black or translucent. In some instances, there would be a fuse holder below the connector at the rear of the radio. To determine always on 12 and ACC 12, a voltmeter would come in handy.
did it work when they or you hooked it up ? if it did work when did it stop working there will be a red wire comming out of the new radio there will be a plastic inline fuse holder in line usually you push white plastic holder towards each other and turn one way or the other and it shoul open and reveal the fuse check the fuse with a multi meter or visually inspect the fuse replace with the same amperage and try stereo. if it doesnt work check the black wire under the dash it will be a ground it needs to be attached to the steel frame with a screw holding solidly if there is a ground and the fuse is good inline then see where the red wire from the radio goes trace it to the source if the source is fusebox check the fuse that its attached to or if its attached to another wire to get the power 12 volts dc . take a close peek if power and ground is good to the radio return it or thake it back in the car to let them see that it doesnt work ok good luck and im sorry to hear that your new music box stopped working im shure you will get it working again talk soon