I have a 1994 Honda Prelude with a factory car stereo (Alpine) installed. An external CD player was also installed by the dealer (it's installed above the stereo in the dash). The CD player is connected to the stereo with an eight pin din connector/cable. When this cable is connected, a switch (AM/CD on the front of the stereo) allows one to select either the CD player or the AM radio. If this cable is disconnected, this switch will only select AM radio.
The CD player has not worked for many years and I decided to replace it with a different player. I decided to use the 8 pin din cable and had to remove it internally from the CD player. I found and noted the pinout for this cable (it was silkscreened on the pc board at the PC edge mating connector). The signal descriptions are as follows;
L. = Signal Left
R. = Signal Right
S.C. = Signal Common
Acc = 12 VDC Accesory Power
BAT = 12 VDC Battery Power
GND = Ground
BUS = Buss
BUS. C = Buss Common
I have been able to resolve all of the connections for the above signals to my new CD player except for the "BUS" and "BUS.C" signals. Without these signals connected, the "AM/CD" switch on the stereo front panel only selects AM radio, so I therefore do not get any signal input from the CD player.
My question is this...
Should I connect the Bus signal wire to 12 VDC to indicate the presence of the CD player or does this signal require some other format?
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Re: 94 Honda Prelude Factory Car Stereo/CD Player
The BUS wires are a serial data link, probably incompatible with other makes of CD player. I'd hesitate to connect it to +12v, this may cause damage. If anything try connecting it to BUS.C through a 1kohm resistor to start with.
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The original wires in the 95' thunderbirds are a pain, trying to figure out how to take out factory stereo and replace with aftermarket Sony cd player, have no clue because the wires don't match up, some do and they will load and unload discs but won't power up any suggestions...?!?
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Not sure I understand your question. Did you buy a harness adapter for GMC, or are you trying to just cut the connector off the factory radio and solder it to your CD player? If the latter, below is the color code for your factory wiring.
1994 GMC Sierra C1500 Car Radio Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Orange Car Radio Accessory Switched 12v+ Wire: Yellow Car Radio Ground Wire: Black/White Car Radio Illumination Wire: Brown Car Stereo Dimmer Wire: Gray 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: N/A Car Audio Front Speakers Location: N/A 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 Car Audio Rear Speakers Size: N/A Car Audio Rear Speakers Location: N/A 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
I assume you want to know which color wires are what from the factory stereo to hook up the Alpine which you have the wire colors for?If you call a Ford dealer,they normally will provide the information for free.I googled a couple of sites but the minimum they want is $14.Good luck! Greg
GO to your local Walmart store and in the Car stereo dept. You will be looking for a factory to aftermarket wiring adapter FD02B made by Scosche.
This will plug into the factory plugs and then have lead wires of the same or similar colors and a wiring schematic to use. It can also be found online at www.scosche.com/products/productID/226 If you are missing the factory wiring plugs you can also order these online, Walmart doesn't usually carry the factory wiring harness. Great company and line of products. Thanks for your question, Dorrian
You could get a stereo installation kit for your year, make & model, that comes with a pigtail plug that would plug right into the existing harness plug and prevent you from having to hack up your original wiring harness.
Car Radio memory Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: The radio harness does not
provide a switched power source. Run a wire to the fusebox for switched
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
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