jread Posted February 24, 2015 Share Posted February 24, 2015 Looking to ad an aux in on my standard 93 Loyale radio but can't seem to find ANY information on the wiring.Its got a 7 pin din input instead of the 5 pin I've seen elsewhere so I am a bit lost. Anyone worked with one of these? My radio doesn't have a tape player but I assume the input I have with a jumper in is for a tape player. Here is the back of my radio the top left is a plastic insert with jumpers between pins between 6 and 7 as well as 4 and 5. Here is a thread I found with a 5 pin din just need to figure out how to do it on 7 pins! http://www.ultimatesubaru.org/forum/topic/123124-any-interest-oem-ea-radio-ponderings/page-2 I also found some other information for other radios but can't quite figure out which pins go where http://www.sl113.org/wiki/Electrical/Ipod This seems to make sense to me so I may just give it a shot but if anyone has experience and could let me know that be great! Link to comment Share on other sites More sharing options...
987687 Posted February 24, 2015 Share Posted February 24, 2015 I did this for my GL. I can't remember the exact pinout, and it's burried under snow up a 1000' driveway right now that hasn't been plowed all year... But what I remember it wasn't very hard to hack. I think there are just two jumper links in that jumper plug. How it works is the audio output from the radio goes out to two pins, and the audio input to the amplifier goes in to two pins. When there's a tape player, it switches the input to the amp between the radio and the tape input (I can only assume), when there is no tape player that jumper plug just runs the audio out from the radio into the amplifier. So.... get a DPDT switch and make up such a circuit on your own! There's no need to jumper the other pins to put the head unit into tape player mode, the screen will still display radio information, but the amp will be playing stuff from your ipod. It's old and dumb, so it works great! I think the idea to my circuit is the input to the amp would go to the center pins of a DPDT switch, the output from the radio goes to the pins on one side, the output from my ipod goes to the pins on the other side, when you switch it, it switches the input! In reality I had a slight issue with ground loops doing this so I made a solid state circuit with an opamp and other stuff to avoid this issue, but I think if you're careful with how you ground everything it'll work fine. Link to comment Share on other sites More sharing options...
jread Posted February 24, 2015 Author Share Posted February 24, 2015 So what you're saying based on this numbering: Put the currently jumped ports on one side of a switch (6-7 and 4-5) and 1-3 on the other side for my ipod? Where should I ground 2? To the frame?I'm terrible with electrics but if the logic is simple enough I can make it happen. The op amp seems above my head since I don't really understand what it is except for maybe a switch that works on its own when you plug in the ipod? Not sure how it would happen but it may.Anyways I guess grounding is my only issue now going to go find a 7pin din male at work and give it a shot hopefully i don't break anything. Link to comment Share on other sites More sharing options...
jread Posted February 24, 2015 Author Share Posted February 24, 2015 Oh wait durp I guess the ground goes to the audio ground in the headphone jack.... Nothing to the frame. This is why I was confused. Link to comment Share on other sites More sharing options...
987687 Posted February 24, 2015 Share Posted February 24, 2015 Oh look at that, a pinout for that damn plug! I figured out what the pins were by just poking around with a scope. My problem all along is likely that I didn't use the correct audio ground, and I ended up chasing my tail for no reason... Oh well. Anyway, yea, put that to the to the aux jack. You can think of 1 and 3 as the aux in, and think of 1 and 4 as just another aux input, if you wanna make it simple on yourself. So basically the switch is changing between the two different aux inputs you have, one being your ipod,or whatever, and the other being the radio. Put the two wires for the amp on the common terminals of a double pole, double throw switch (DPDT), the aux in on one side, and the radio on the other. That way when you flip the switch the amp is always connected, and it just hooks up to either radio or aux. Link to comment Share on other sites More sharing options...
jread Posted February 26, 2015 Author Share Posted February 26, 2015 Wow the numbering just dawned on me... They move through what a 3 pin, then 5 then 7 pin would have. Didn't understand the mixed up spoob there! Actually completely misunderstand what I was doing before but now I think I'm getting it. I'm going to have to have 4 posts in and 2 out am I not? 2 for radio L and R as well as 2 for AUX L and R into 2 amp outs? Instead I think I'm going to use 2 switches since I already have a handful of them and wire as below: Does this make sense? If both switches are switch to radio then I'll get full radio, switch both for aux. Kind of complicated but I've already got a handful of normal switches. I was going to mount all of it in the ash tray anyways and have the buttons click on automatically as you pull the tray out and push off when you push the tray in so once the work is done I won't have to turn on two things, or even one! Also I guess if I wanted to listen to my music and my girlfriend wanted the radio we could make it happen by flipping one off and one on! Link to comment Share on other sites More sharing options...
987687 Posted February 26, 2015 Share Posted February 26, 2015 To avoid confusion, connecting the wrong stuff to the wrong things, get the proper switch. A DPDT switch is really cheap and it's the correct way to do this. I drew a picture, with both the circuit diagram and a picture of the connections on the actual switch for you. Just hook it up like that and you'll be fine. The tip of the audio jack is left, the small ring is right, and the big ring at the base of the connector is ground, hook that to pin 2. If you look at the circuit model, you can see that pin 5 and pin 3, the ones that go to the amp are always connected. And the other pins are either connected to the amp, or left floating (which is technically bad, but whatever). This eliminates the possibility of the wrong things being connected together, which is the worry with using multiple switches. Here's the link to my quick drawing. http://i.imgur.com/As0gOTA.jpg Link to comment Share on other sites More sharing options...
jread Posted February 26, 2015 Author Share Posted February 26, 2015 There wouldn't be a possibility the way I would do it as as you open the ash tray drawer it would flick them both on!I will take the advice and go look for a switch though will be less of a pita if its on one and need to go find a 7 pin DIN since I didn't see one at work yesterday. Link to comment Share on other sites More sharing options...
987687 Posted February 26, 2015 Share Posted February 26, 2015 I mean, I suppose you COULD do it with two SPDT switches, but the drawing you have there doesn't make any sense to me why pin 3 and 5 are connected to two different terminals. Doing it with two SPDT switches would be basically taking my switch diagram and cutting it in half the long way. If you have pin 3 or pin 5 connected to more than one pin, you did it wrong. What do you mean, a 7 pin DIN? The plug for the back of the radio? I seem to recall I just took the cover off the radio and soldered to the circuit board, but I can't honestly remember exactly what I did. Link to comment Share on other sites More sharing options...
jread Posted February 28, 2015 Author Share Posted February 28, 2015 Think I found a DPDT at work today so that should work.3 and 5 are connected to two pins because the switch has to choose between two things radio or aux, and because I have a switch for both left and right it needs to go two to one. Link to comment Share on other sites More sharing options...
jread Posted February 28, 2015 Author Share Posted February 28, 2015 Pulled the plug off the circuit board just need to figure out which pins are which terminals on the circuit board. Seen an image like this? Link to comment Share on other sites More sharing options...
jread Posted February 28, 2015 Author Share Posted February 28, 2015 Also figured that out.Now I just need to get some wires and test it out! Link to comment Share on other sites More sharing options...
987687 Posted February 28, 2015 Share Posted February 28, 2015 Pulled the plug off the circuit board just need to figure out which pins are which terminals on the circuit board. Seen an image like this? What image? Link to comment Share on other sites More sharing options...
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