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Connected the power and ground but monitor doesnt turn on, tryin to connect my in dash radio

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Wire diagram under dash 1996 ford ranger

If the wire is firmly attached wherever it is attached, and properly insulated (i.e. "electrical tape" etc). Then that is not the problem. If the radio is turning _off_ when you hit a bump. (meaning it was "on" and then "bumps" make it go off and on again), then either the radio is loose and needs to be tightened, and/or the ground wire connected _to_ the radio's "metal" is loose; (usually a wire connected to a bolt in the rear of the radio). When I say the radio may be loose and needs to be tightened, I am _also_ saying the radio may be getting it's electrical "ground" just by being bolted onto the car (if the area where the nuts are attaching the radio to the car is made of metal and not just all plastic). // Ok... First, make sure that wire under the dash is a good solid connection and _then_ make sure it is insulated (such as with electrical tape). Then you need to find out if a "ground wire" is going to the back or sides of the metal part of the radio, or if the "ground" is being made where the radio bolts to the car (which would be the case if that area is all metal and not plastic). BTW... That wire that is connected under the dash is connected to "positive". As long as it is a good tight connection, and safely taped or otherwise protected, it is fine and can stay that way. Tighten up the radio's bolts and look to see if there is a wire going to the back metal body of the radio. Make sure it is a good connection. Finally, if the radio is tight, but there is no separate wire going to "ground," and the problem continues... Then the solution is simple. Just add a "ground wire." Run a wire from _any_ area of the dashboard that is _solid_ metal and there is a screw/bolt you can attach the wire to (such as a metal support bracket bolted to the metal dashboard), and then connect that wire to _anywhere_ on the metal of the radio where you can make a solid connection. (There is usually a bolt in the back of the radio that is meant to be used to mount a bracket to make the radio "firm." (so that it _doesn't_ "bounce" around). Anyway, you can attach the wire there if you have a nut that fits the bolt. If not, then simply loosen _any_ screw in the metal area of the radio, and slip the wire under the screw, then tighten the screw with the wire firmly under it. That will give you a "permanent ground," and the bumps won't cause you to "lose ground" anymore when the radio shakes; which it wouldn't do if there was a proper support bracket added to that bolt in the back of the radio. (I've tried to explain this as simply and clear as possible, which is why it is so long, with some "repeating myself". If you can follow this, it _will_ solve your problem). Best of luck... --Gregg

Oct 15, 2015 | Ford Cars & Trucks

1 Answer

To which terminals do I connect the power leads to the radio of a 1957 Corvette?

Go to magicmechanic and send him issue....hes replies soon

Sep 04, 2015 | Cars & Trucks

1 Answer

I have an 89 camaro rs, I am getting power to the red power wire on my radio, but when I turn on the car I get no response and cd radio will not work. Any ideas?

there are two power wires to most radios. usually red and yellow. the red wire provides 12v when the key is turned on and yellow provides a constant 12v. both must have power to turn the radio on. there will be two fuses for the radio also so make sure both fuses are good. the only other thing that will keep the radio from coming on is the ground wire "usually black" that has to be connected to the ground in the factory harness or you can just connect it to any bare metal behind the dash

Oct 20, 2012 | Cars & Trucks

1 Answer

I have a 1990 Celica, trying to put in new radio. Got everything wired up correctly, Constant - blue/yellow, acc - gray, ground - brown and it won't come on. Radio fuse (top center 15 amp) is good,...

You have it right. Use a 12 volt test light to see if there is power between the gray and brown wires when the key is on. If there is power there, you may have got hold of a bad radio.

1990 Toyota Celica Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Blue/Yellow, connects to yellow
Radio Switched 12V+ Wire: Gray, connects to red
Radio Ground Wire: Brown, connects to black
Radio Illumination Wire: Green, do not use
Radio Dimmer Wire: N/A
Radio Power Antenna Trigger Wire: Black/Red
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 4? Speakersir?t=modilife-20&l=as2&o=1&a=b00009uhre
Front Speakers Location: Dash
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Blue
Rear Speakers Size: 5 1/4? Speakersir?t=modilife-20&l=as2&o=1&a=b00009uhre
Rear Speakers Location: Side Panels
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White

Oct 29, 2011 | 1990 Toyota Celica

1 Answer

I just bought a 2006 Toyota Corolla S, and my dash lights and tail lights wont come on. All the other lights work, such as the headlights, break lights, turn signals, four ways, front fog lights and...

the tail light issue could be just bad bulbs, check them with a meter ,, also, check the sockets for power to each contact point,, normally if the brake lights and flashers are working, the tail lights should too,, as far as the dash lights have you installed an after market stereo? If so a common problem is a wrong wire got grounded,The harness from the car to the factory radio has a wire for the dash lights that shows up as ground with the light off. When the lights are on the wire is 12V+. Check to see if you connected the ground from the new stereo to this wire. The radio will work perfect but everytime you turn thr park light on the fuse will blow...and the radio will continue to work. There should be a ground wire in the harness as well, ensure you connect the ground from the new stereo to this wire. there is a 15 amp fuse that blows, check them with a meter rather than by sight

Aug 07, 2011 | 2006 Toyota Corolla

1 Answer

Turned key..nothing happened, dead, no dash lights interior lights or mileage, released hood button, dash instruments came on, turned key car started..while driving radio goes on and off as well as the...

Check ALL Power and Ground connections coming off the Battery to circuit anchor points. Ignition and Services fuses for a Power supply. If all proves ok, then go to the Main Ignition control Relay and check the condition of the Pins and Recepticles. That is where your apparent problem may eventually be. But travel the initial route first, looking and feeling for Loose or Dirty connecting points.
Regards, David

Nov 28, 2010 | 2006 Chrysler Sebring

2 Answers

2 din radio of when headlights on

Its the ignition live wire! they are nearly always yellow but please check your diagram. you will need to connect it to live.

Jan 15, 2010 | 2004 Mitsubishi Lancer

1 Answer

I can't see anything on the front of my car radio its a kenwood cd changer KRC-387

cHEAK ALL THE FUSES FOR THE CAR THE CIG LIGHTER , RADIO BODY AND DO THE DASH LIGHTS WORK AND OTHER CAR THINGS WORK RIGHT. THEN THATS GOOD CHEACK THE WRES CONNECTED TO THE RADIO MANY INSTALLERS USE POOR TECHNIQUES TO CONNECT THE WIRES TWISH TOGETHER AND TAPE! Soldered connections that are shrink wrapped and carefully routed and tied off work good and look like the manufactor of the car did it the power or ground wires way have disconnected cheak them as most aftermarket radios tell whitch wires are to be power and what kind ( key on, Battery, dash liughts,) and the ground. If these all test good then the radio mayhave blown it's fuse. ( a speaker wire could be crossed) if all appears good even though you gave good money for the radio their not worth fixing them for internal damage and it's timefor anew one

Dec 05, 2009 | Cars & Trucks

2 Answers

Connected jumpers wrong, radio doesnt work now

there is 2 wires for the stereo. a CONSTANT 12V wire and an ignition wire. make sure theirs power going to both. check all the fuses even accessories fuse. you may need a test light and have to remove the stereo out of the dash to check for power. also check the grounds

Feb 16, 2009 | 2000 Audi A4

1 Answer


If you've confirmed power to rear of radio @ harness in 2 places, make sure you have good ground also, and if you have power & good ground, make sure all connections are clean & tight.

Jan 24, 2009 | 1994 Chrysler LeBaron

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