I want to hook my BOSS car radio up to a battery to see if its working . Model NO. BV9376B . What color wires do I use for the power supply ?

Boss BV 6656B radio read the manual first. no really
and look for batteries inside that are dead first. always this FIRST.
a car radio RIGHT, posted to computers, and is NOT.
the Radio will have 2 power sources, most times.
1: ignition on.. ACC.
2: memory. (this must go to the car battery , hot full time wire in harness)and fused
if not wired right this will fail.
boy finding the install manual is a pain on this BOSS, users manual is useless, for that.. zero facts there but click rules..

what does Grill system mean,? google shows Zero hits. why use that word, dash? mounted, you mean?
it has a remote so remove its battery if they are weak
any remote on earth can go NUTS, (low battery worse of all)

ok you can remove all power to the car radio, all wires, power.
then wait overnite and try it then. (a level 1 reset on any thing electronic if batteries inside those out too)
most car radios have no battery, but BOSS id never guess.


the power button on the RAD has long press mode. use that?
>3sec long. it states.
the yellow wire is memory wire, remove that to reset radio.
red wire is ACC./IGN on wire main power remove both to reset radio.
I think i covered all ways to fix this problem..
remove power
replaced remote batteries first. as is the case always, first.

Sounds like your Memory +12V wire is not connected properly. If this wire does not have a constant source of power then you will lose all of your settings on your radio.

Things that may cause you to lose power through the Memory 12V wire:

• Not hooked up properly to the battery
• Bad battery
• Bad ground
• Loose wires

Boss 637UA manual

12v switched goes to the ignition so that the radio will turn off and on with the car. the other goes to the battery. this is so the unit can remember things like radio stations and other user configurations.

the 2 power lines to supply batery and black to ground blue to speaker

Download the pdf copy of the manual at the link below and look at
21 and 22 that shows wiring diagram.

http://pdfstream.manualsonline.com/f/fd2d8ecd-8d17-4fb7-82b0-c5d6ae2fb3f6.pdf

Here is the wiring diagram make sure you have a good earth.
Red to 12 v IGNITION and yellow to constant battery power. Hope this helps

Assuming you have an aftermarket radio. You must remove the radio so you can attache your RCA cables and the remote turn on. Run these down one side of the vehicle back to the amplifier. Run the power wire from the battery back down the other side of the vehicle to the amplifer (remember to place your fuse within 12 inches from the battery connection. You will need to find a grounding point. I recommend removing one of the side carpeted panels to do this. You will be able to find the frame. Make sure to sand around where you will be connecting the ground. Hook wires to the amp (RCA to correct color RCA wire inputs, Ground wire to (-), power wire to (+), and remote wire to it's screw terminal. The other end of the amplifier should have the speaker outputs for your subwoofer(s). Hope this helps. If you need more information visit www.mobileinformationlabs.com

If there's a harness in the dash still, do not cut it off! The easiest thing to do is get a wiring harness that will connect to your Boss radio and then plug right in. You can get them from Amazon or your local electronics store like Best Buy. You can sometimes find them at WalMart as well. The benefit of going to a place like Best Buy is that they have an installation bay with trained techs so they can ensure that you have the right harness. The colors on this harness should match that of the Boss stereo and it's just a matter of soldering/crimping them together.

If the harness has already been cut, its a little more difficult cause the factory wiring doesn't match what's on the Boss. I found the wiring colors for a 94 Pathfinder here but couldn't find any for a 94 Nissan Truck. They should be the same/similar but either way your should still check the ignition/switched and constant power wires with a multimeter before connecting them to the new radio.

For the constant, you can get ground from any piece of metal inside the dash, touch it to the wire the suggested in the diagram. The meter should show 12v or just under. Do the same for the ignition/switched, you shouldn't get any reading. Turn on the ignition and it should go to 12v or just under.

For the speakers you can check the pair with a 9v battery. Take the two wires for lets say the left speaker, blue/white and blue yellow, and touch them to the positive and negative terminals of the battery. You should hear a pop from the speaker. If you don't most likely the wiring is different from what I have listed below which is fine.

After figuring out the which wires are the powers and ground you can basically take one wire and put it on the positive terminal of your 9v battery. Now go through the rest of the wires and tap them one at a time to the negative terminal. Do this until you hear a pop not the wire colors and which speaker made the noise. Now move on to another wire and repeat.

The downfall of doing this is that it doesn't tell you polarity. After you finishing connecting the radio to the in-dash wiring turn it on. Listen to the sound carefully. If it sounds tinny one or more of the speakers polarity are incorrect. Try to determine which speaker/s sound tinny and reverse there wiring. Check again and hopefully everything's sounding good.

1994 Nissan Pathfinder Car Stereo Radio Wiring Diagram
Car Radio Constant 12V+ Wire: Red/Black
Car Radio Switched 12V+ Wire: Blue
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Red/Yellow
Car Radio Dimmer Wire: N/A
Car Radio Antenna Trigger: N/A
Car Radio Amp Trigger Wire: N/A
Front Speakers Size: 5? x 7? Speakers
Front Speakers Location: Doors
Left Front Speaker Wire (+): Blue/White
Left Front Speaker Wire (-): Blue/Yellow
Right Front Speaker Wire (+): Brown
Right Front Speaker Wire (-): Brown/White
Rear Speakers Size: 5? x 7? Speakers
Rear Speakers Location: Roof Mount
Left Rear Speaker Wire (+): Red
Left Rear Speaker Wire (-): Green
Right Rear Speaker Wire (+): Blue
Right Rear Speaker Wire (-): Pink

I hope this was helpful

Ray

RCA jacks are used for outputs to an amp.
The speaker output wires will normally be a color per channel, the "A" leg will be the color and the "B" leg the same color with another colored stripe running along its length.
As for power supply the yellow would be for memory and needs to be connected to a permanent power supply ie direct to the battery.
The red is for main power. Connecting it to the ignition will switch the radio off when the ignition is turned off, or connecting it direct to the battery will allow operation of the unit irrespective of the ignition switch position.
The blue is used to power additional accessories such as an antenna or amplifier. If you are going to operate an electric antenna through the unit it is best to use a relay.
Black is to be connected to battery negative or any good earthing point on the vehicle body. For further assistance please leave a comment. A model number of the stereo would also help if you need more in depth assistance

Have you measured the 12v ignition and permanent supply?
Also check the earth.
You will need a tester for this.
Check the fuses

John w