[Alex]

Hi all. There was a question about the support of this radio (see photo) steering control for Pontiac Firebird 4gen 1994. There was an idea to restore the original (which I don’t have at all), but first convert it to bluetooth and aux by removing it from the control and connecting the PDA to 10.1 inches. But it is very important to keep control from the steering wheel, as I repeat, to install the PDA from the radio, I dismantle all the controls.

 

[Injuneer]

@1993TransAm is best equipped to answer this

 

[Alex]

@1993TransAm is best equipped to answer this

😃🤝

 

[Alex]

Could not find a wiring diagram for this radio. Therefore, there is no certainty yet that it supports steering control.

 

[1993TransAm]

Does your car have steering wheel controls? If so, do they work?

Can you post a picture of the steering wheel?

 

[Alex]

Of course have. The buttons have been redone and cleaned. When pressed between the red and blue wires, a different voltage value appears.

 

[1993TransAm]

The Delco radio you have pictured should work with the factory steering wheel controls, but I cannot be certain of that. There were so many part numbers associated with that style of radio over the years.

 

[Alex]

It seems to be, but there is no clear certainty yet. So far, all that I have been able to find from the connection diagram (my version is on the right) is a 24-pin pinout. This radio has 20 pins. Until there is confidence that everything is connected correctly, there will be no understanding of whether it works or not.

 

[1993TransAm]

The diagram on the right-hand side shows a two-row connector with 12 pins for the auxiliary connection. This connector would include steering wheel control input and remote CD changer (or cassette) inputs and outputs. The radio that you have pictured shows a one-row auxiliary connector that appears to contain 10 pins. Is your diagram correct?

 

[Alex]

I do not have the original radio connector, it was simply bitten out before me. I will restore everything, and finally it turned out to find a circuit for the radio tape recorder that I have. I finish soldering the connector and will check.Monsoon FAQ - LS1TECH - Camaro and Firebird Forum Discussion

 

[Alex]

There is a lot of information on this subject here. Perhaps it will be useful to someone.

 

[Alex]

Today I restored the original radio connector. I managed to find a connector from the version without steering control (two wires less), naturally with cut wires at the very end. I decided to solder a block with an extension cord for the “dad”, in the car I will crimp everything that is cut off for the “mother”, well, I added two wires to control the steering wheel. In this case, in the future, when replacing the radio with any other non-standard one, you can simply remove the original connector. Now it remains only to collect and test.

 

[Alex]

Today I tried to connect the radio, everything works, and the steering wheel control also works! True, the “Pre-set” button makes the volume quieter, but all the buttons work. This is most likely due to the difference in voltage for the buttons for this radio model. I will finish finalizing the radio with a bluetooth transmitter and then I will switch the buttons on the steering wheel so that all the values correspond.

 

[1993TransAm]

Alex,
Which cavity do you have the steering wheel control wire pinned to? You may be able to re-pin the wire to another cavity and they will function properly.

 

[Alex]

Steering wheel button control, blue wire, 14 pin.

 

[1993TransAm]

Alex: The 1994 wiring diagram for the steering wheel controls shows a dark blue wire pinned to cavity #6 in connector "C4." The 1994 radios were wired differently from all of the other fourth generation Firebirds. I am not certain if "C4" is the secondary connector in the back of the radio, or if it is part of the larger 20-pin connector. Does your car have a secondary wiring connector for the radio with a single blue wire in it?

 

[Alex]

Yes, that's right, the 1994 factory wiring diagram shows a separate third C4 connector with one blue wire for the buttons on the steering wheel. In my car, the wiring to the head unit was cut (the wires were cut). Accordingly, it turns out that another radio tape recorder is needed for the C4 connector, and it is connected in a different way (example in the photo on the right).

 

[Alex]

I did the wiring for this radio. Find another (as in the photo above, I failed).

 

[1993TransAm]

You will probably need a radio with a 7-band equalizer for this to work. The backs of the radios in 1994 do not look like the ones in the diagram above. The radios in the diagram look like 1993 and older models (2000 Series).

 

[Alex]

In the presence of a radio with a 7-band equalizer, there were no questions at all (this is a configuration option for 1994). Unfortunately I don't have one, this is all I could find. Radios on the diagram look older than 1994, those that were completed on Boneville 1993-1994 and possibly only older Firebird.