[daveagain909]

is there a simple way to add a auxillary input to a factory 1990 reatta radio. I have one of my radios ripped apart and I am looking for a way to add this input so I can use an Ipod
ETC. Is there a simple way to do this? If so details please.

[D-a-n-i-e-l]

Use the factory aux in. Te one where the cd player plugs in.

[daveagain909]

Which is the factory aux in. is it THe seperate connector or is one of the connectors in the 4 pack female connector? if so what is the feed out. (HOW DO I WIRE IT?)
can I buy a male connector?
appreciate your information.

[daveagain909]

I was just looking at my radios. and I think I now know which one it is. It is one of the two 6 pin connectors located in the bottom left position on the 4 pack? is that right?

[daveagain909]

bump

[xerxes]

What does bump mean?

[handmedownreatta]

bump is a way to get the topic back to the top of the list.

[KDirk]

xerxes-

"Bump" is utilized to bring a thread back up to the top of the list in the forum so it get exposure.

Dave-

If you look at the top sheet metal housing of the [1990-1991] radio, you will see three columns of information "stamped" into the metal. This is the pinout listing of the connector at the rear of the radio. The numbers listed represent a pin number on the connector.

The connector housing itself has numbers embossed at the edges (#20 at top left, #11 at top right, #10 at bottom left and #1 at bottom right. These are not so easy to see, but they are there. You can count of pins from one end or the other based on the numbers at the ends of each row.

The label next to each number stamped on top represents it's corresponding function. Note that the third column shows the label first, and the pin number to it's right nearest the rear edge of the radio housing.

Looking at mine (pulled from the car, so I have it sitting here) the following is shown in the second column:

# DESC NOTES

11 L-AUX Left channel auxiliary in.
12 AUD-C Left channel common? (audio ground)
13 R-AUX Right channel auxiliary in.
14 AUD-C Right channel common? (audio ground)
15 VOICE input for integrated cell phone audio
16 GRD Main ground

17-20 are right and left rear speaker outputs.

So, it seems that pins 11 and 13 are the left and right auxiliary inputs respectively. I am interpreting 12 an 14 as the corresponding common for the left and right channels respectively, but the labeling is a bit odd.

I don't know if the auxiliary in is auto-sensing on this radio or not. Some are (88-89 RIM module apparently is based on Daniel's past postings on the subject) but I've not experimented with the 90-91 radio as I removed it from my car for the installation of something "better".

Note the separate 7-pin connector for the outboard CD player is only used to provide power, illumination/dimming control and data (E&C bus) between the radio and slave CD player, so you shouldn't need to do anything with it.

KDirk

[daveagain909]

so do I need to use 12 and 14?

[KDirk]

Dave,

If I am correct on the pinout and their corresponding functions, 11 and 12 are left aux + and -, 13 and 14 are right aux + and -. Think of an home stereo audio hookup cable (with RCA plugs on either end) for example. The tip at the center of the RCA plug is the + in the audio signal. The ring, or outer edge, is the - in the audio signal.

Each audio channel requires a positive and negative connection to make a complete circuit, so you will have two wires, + and - for each channel, and four wires total for both channels.

The only thing I am unsure of based on the function labeling for pins 12 and 14 is that they are in fact the negative inputs. Logically they are, as such connections are usually grouped in a pair, positive on one pin, and negative on the next one.

I hope this makes sense.

KDirk