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kccode1Wed Jul-21-10 11:15 AM
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"Wire diagram for 93 Radio/Amp"


          

Does any body have the wiring diagram or the pinout of the plug for the JBL Amp or Radio on the '93?

My radio is not playing and want to test if it is the radio or the amp. I was going to try to test the outputs on the radio before the amp to see if I have anything there.

I could not find it in the manuals at the library.

  

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Subject Author Message Date ID
RE: Wire diagram for 93 Radio/Amp
Feb 26th 2009
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RE: Wire diagram for 93 Radio/Amp
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      RE: Wire diagram for 93 Radio/Amp Next question
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callouieThu Feb-26-09 08:18 AM
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#1. "RE: Wire diagram for 93 Radio/Amp"
In response to Reply # 0


          





Calvin Louie
1989 Porsche 928 S4 - Linen Metallic / Linen

  

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kccode1Thu Feb-26-09 02:39 PM
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#2. "RE: Wire diagram for 93 Radio/Amp"
In response to Reply # 1


          

THANK YOU MUCH! Calvin.



  

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kccode1Thu Feb-26-09 05:52 PM
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#3. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 2


          

Ok I checked that. Now I have two other questions for anyone.

The head unit is not putting out sound so It must be bad, but when I unplug the head unit I still get some poping sound from the speakers. Does this mean my amp is bad too? I hooked up a source to the amp and it played ok on all four channels each. just get the popping when it is unpluged.

Second question is what is the smaller plug into the amp for? I don't have anything pluged in and it looks like an RS232 plug. Is this for the phone? I did not think there was a phone option in 93.


  

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smwoodwardThu Feb-26-09 08:29 PM
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#4. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 3


          

don't know about the smaller plug...

as for the popping, this could be normal when you plug/unplug the head unit while it powered up. Sometimes the caps in the amp when they charge up with output a "pop" from the speakers.

  

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kccode1Thu Feb-26-09 09:35 PM
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#5. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 4


          

It is more like a crackling or burning sound. Went on for about 30 seconds or so. It is not just a single pop.

I just don't want to burn up another radio if I put one in, and I really can't justify putting in a whole new system with amp and wiring.

  

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sarti8054Fri Feb-27-09 02:51 PM
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#6. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 5


          

Not Sure about the plug, but yes the phone was an option in '93. I have a similiar problem with my radio only playing from the right channel. I have changed the amp with a known working unit and it made no diff. will be getting a new head unit soon to check this also but interested in seeing how your situation comes out
Bob

  

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bobotechSun Mar-01-09 08:55 PM
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#7. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 6


          

Do you guys have the changer still in place and hooked up?

My 93 has a weird setup. The Changer is what drives the power of the amp. If I disconnect the changer, the amp shuts down and i get that weird popping from the right channel that you speak of.

If I plug the changer back in, it works again.

_______________________
97 Mark VIII LSC Green on Gray
94 Mark VIII White on Gray
I love cheap luxury cars

  

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kccode1Sun Mar-01-09 09:22 PM
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#8. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 7


          

Yes I knew that. There is a jumper block if you don't have the CD changer that makes the radio work.

I am talking about when I have every thing unpluged from the head unit. I would think that since I have nothing going into the amp it should not be making noise. I had replaced the head unit about 2 years ago with a used one. I just want to make sure the amp is ok and not making the head unit go out.

  

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bobotechSun Mar-01-09 09:46 PM
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#9. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 8


          

Jumper block?

This is news to me.

I have been out of the Mark VIII scene for at least over a year now. I'm going to be getting my car running again so I am researching things again.

This jumper block sounds like it might solve the problem I had when I installed the aftermarket stereo in my Mark almost 2 years ago.

Any links or info about it, please?

_______________________
97 Mark VIII LSC Green on Gray
94 Mark VIII White on Gray
I love cheap luxury cars

  

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kccode1Mon Mar-02-09 02:17 PM
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#10. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 9


          

The jumper block is for the factory head unit. It plugs into the back of the unit in the place were the CD changer plugs.

I have some photos I could send you since we can't post a photo in this message.


  

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bobotechMon Mar-02-09 04:19 PM
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#11. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 10


          

Yeah that would be appreciated. I would love to reverse engineer that jumper block so taht I can figure out how to power on the factory JBL amp with an aftermarket stereo.

Currently, if I don't bypass the amp, I am forced to use the factory head unit with the changer hooked up.

If I don't use the factory head unit, the amp never gets powered up and I haven't been able to figure out how to get it to work.

_______________________
97 Mark VIII LSC Green on Gray
94 Mark VIII White on Gray
I love cheap luxury cars

  

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kccode1Tue Mar-03-09 02:00 AM
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#12. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 11


          

This has nothing to do with the amp itself. It is a jumper for the head unit to work without the CD changer plugged in.

What you are trying to do has to do with the radio on output. If you look at the diagram you will see on connector C257 pin 8 is the radio on signal. It is listed as circut 689 and is dark blue. This is what is commonly reffered to as the 'remote' for aftermarket amps and is usually blue on those also.

It sends power to amp when the radio is turned on. You would need to hook this wire to your remote output on your aftermarket radio. This is similar to pin 7 above it which is the output for the power antenna.

The only caveat is that when I tested my head unit that circut from pin 8 was 6 volt not 12 going to the amp. Some one else may know if that is what it is supposed to be since my head unit is not fully functional.

That is what will power your amp up.

  

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bobotechTue Mar-03-09 03:18 AM
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#13. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 12


          

The problem is that if I have my factory h ead unit in place and all the harnesses plugged in (there are 3) into the back of the head unit and the changer is NOT plugged in (at the changer), the amp won't power up.

If I then plug in the changer plug to the changer, the amp then powers up.

The harness adapters for aftermarket units only have the 2 plugs for the c257 and c258 plugs, they don't have the c264 plug which is where the issue lies.

So I'm looking for the wire on C264 at the changer end that sends the amp turn on signal. It isn't the one on C257 like you would think.

That is the weirdness with the 93 marks. I don't think any others had this weird wiring.]

_______________________
97 Mark VIII LSC Green on Gray
94 Mark VIII White on Gray
I love cheap luxury cars

  

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JomWed Mar-04-09 09:09 AM
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#14. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 13


          

I believe you will need the jumper plug. The audio signal was sent through the CD changer in the old days. I'll bet your amp is powering up, just not getting audio. There shouldn't be any amp turn-on in the CD changer because some vehicles shipped without CD changers.

If I remember correctly, the jumper plug was 4 pins, and two were common to each other, so the audio was sent directly back into the unit.

On a previous subject, newer Ford products use a 5v circuit to turn on the amp. You can send 12v, but it will probably give you a loud turn-on thump, which you can alleviate with a 1000 ohm resistor in line with the turn-on wire.

Jom
'98 LSC
All Black

  

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kccode1Wed Mar-04-09 01:40 PM
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#15. "RE: Wire diagram for 93 Radio/Amp Next question"
In response to Reply # 14


          

Sent you a PM. You or I am confused on what you are trying to do.

  

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