I installed a radio in my friends Honda Prelude 1991. I'm fairly certain that I hooked up all the wires correctly, but the back speakers will only come on when the radio is very loud. And they speakers don't stay on, they kinda go in and out. Any ideas what the problem could be? Thanks
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Hi, the factory radio uses the illumination wire, but the aftermarket
radio does not. You have to make sure that wire is taped off so it
doesn't short the illumination circuit. Check your tail lights fuse.
If it's blown, pull the head unit and disconnect/tape off the
illumination wire (blue with a white stripe) from the factory harness.
Then put in a fresh fuse. If you have more questions, please specify
the model of the head unit.
1991 Ford Festiva Car Radio Wire Diagram
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Red/Black
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Blue/White
Left Front Speaker Positive Wire (+): Blue/Red
Left Front Speaker Negative Wire (-): Blue/Yellow
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Blue/White
Left Rear Speaker Positive Wire (+): Blue/Red
Left Rear Speaker Negative Wire (-): Blue/Green
Right Rear Speaker Positive Wire (+): Blue/White
Right Rear Speaker Negative Wire (-): Blue/Green
the pink wire is for amplifier and ur car must have one built in side under the dash or in the back or ur car or suv try to see if u might have one cause if it does not have power going to it ur speakers will not work i hope this helps.
It sounds like they messed up your installation. You can confirm their work by verifying that each wire was attached properly.
2005 Pontiac Sunfire Car Radio 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: Pink
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
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
Click on this link for a PDF of the installation instructions of the radio (If you don't have the installation guide that came with the radio).
Illumination is the grey wire from the car to the orange with white stripe from the radio.
I suspect that the yellow wire from the car is not connected properly. When the orange wire (constant power from the car) is attached, but not the yellow wire you can insert and eject cds, but it will not turn on. Constant power is used for maintaining the clock and preset radio stations.
If everything looks correct, I would take your car back to the installer and have them correct the issue.
sounds like a short in your wiring to your speakers the best thing to do to check this is run a speaker wire directly to the speaker from the stereo check it that way and see if it works.If that don't work it's the wires on the stereo connection.The speaker wires on most aftermarket stereos are mostly colored 2 of each green,purple,white & grey.
I had the same problem and here's what fixed it. By default, I did not connect the blue/white striped remote wire to the harness. Apparently there is an amp somewhere in the vehicle I did not know about. After looking at the factory wiring and the aftermarket harness, I noticed that the remote wire was used and I connected it with the remote wire on the harness and everything came up and worked perfect.
I have a 93 accord ex with the bose amp system. Had a Sony deck put in it. It had the popping and the noises. It was installed at a store and they had to hook the red power wire to the antenna wire to get the sound to come out of the system when playing a CD. I thought that was bogus to have the antenna up all the time so I took it back out and put another quick hookup harness in it and it did the same thing. Will not put out any sound till the red power wire is hooked up to the antenna wire so that it goes up when the key is turned on. Installed the same stereo in a 94 taurus SHO with amp and it worked great. I believe that there is an expensive kit that converts the bose system to hook up a unit so that it doesn't pop click buzz, and have to have the antenna up to play.
1991 Ford Explorer XLT Radio and Speaker Wire Colors
Pulled out the stock radio and found two plugs on the back of it. One plug had 7 wires (Power, Dimmer, Amp etc.) and one had 8 (Speakers).
7 wire plug (I could see these wires immediately from the plug):
Car Radio Battery Constant 12v+ wire = Light Green w/ Yellow Stripe Car Radio Ground Wire = Black Car Radio Accessory Switched 12v+ wire = Yellow w/ Black Stripe Car Radio Dimmer Wire = Light Blue w/ Red Stripe Car Radio Illumination Wire = Orange w/ Black Stripe ?? Don't know ?? Red Wire (No power to wire Constant or Accessory) Car Radio Amp Wire = Blue
8 Wire Plug (Wires were wrapped in a grey outer sleeve, had to cut sleeve to get to wires.):
Right Front: White w/ Green Stripe (+) Brown (no stripe) (-)
Right Rear: Purple w/ White Stripe (+) Light Blue (no stripe) (-)
Left Front: Light Green (no stripe) (+) White w/ Orange Stripe (-)
Left Rear: Light Blue w/ Black Stripe (+) Yellow (no stripe) (-)
Speaker Wires (found at the individual speakers in the doors)
Right Front: White w/ Green Stripe (+) Green w/ Orange Stripe (-)
Right Rear: Orange w/ Red Stripe (+) Black w/ White Stripe (-)
Left Front: Orange w/ Green Stripe (+) Blue w/ White Stripe (-)
Left Rear: Red w/ Green Stripe (+) Red w/ Blue Stripe (-)
Hope this helps. I spent hours looking for the correct color key and this one works for my '91 Explorer.
Your head unit may not have a common ground for the speakers. If you have two wires for each speaker coming from the head unit, rewire the speakers for a floating ground, that means two wires per speaker, or use a floating ground adaptor. These radios now a days are NOT like the radios in the hay days of care audio. If you already did not cause any damage to your unit, you certainly will if you continue to use it the way it is hooked up now. Good Luck