I've got an AM radio for my dad's original 68 Z/28, but the original harness and connector are long gone. Looking at the radio from the bottom, I believe the 3 pins are GRD, SPKR, +12V in that order. I have a front speaker that has a black and a green wire. I'm guessing I connect the green wire to the SPKR connection on the radio. Where does the black wire go? Just any ground?

When hooked up, minus the speaker, the light works and all. I'm hoping that this speaker works and we can jam to the local AM news show! http://www.camaros.net/forum/smile.gif Yeah, buddy!

Seriously, I just think it'd be cool to have it work. I looked in the service manual and the wiring diagram doesn't specify the connections for the speaker unless I totally missed it. Also did a search on this board and didn't find my answer.

Thanks.

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1967 Camaro
406/M20 11.94@117
http://www.mindspring.com/~gordon.warren/

The original radio connector was a 3 receptical connector in which 2 of the pins were female..both for the speaker (1 green. 1 black) The third receptical was larger and empty to accept the power input wire (yellow)which has a female connector in itself. So, the 3 pin connector plugs into the radio while the single pin power wire plugs into the vacant space.To directly answer your question, the black wire doesn't simply ground "anywhere", it has it's owm GRD spade connector in the radio.

Gary

Aha! Thanks for the info, man. Hopefully this thing will work once I wire it up correctly.

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1967 Camaro
406/M20 11.94@117
http://www.mindspring.com/~gordon.warren/

Actually, you CAN ground the black speaker(-) to any convenient ground. The radios use a common ground for power and speaker return. To insure a good connection though, I would recommend you connecting the speaker (-) speaker lead to the the "ground" terminal on the back of the radio, as that is where it originally went, right next to the speaker output terminal (speaker +, which is green).

I seriously hope you are using at least an 8 ohm speaker as the modern 3-4 ohm units draw twice the current through the output transistor causing premature "burn-out".

<BLOCKQUOTE>quote:</font><HR>Originally posted by Coppertop:
I seriously hope you are using at least an 8 ohm speaker as the modern 3-4 ohm units draw twice the current through the output transistor causing premature "burn-out".<HR></BLOCKQUOTE>

It still has the original speaker under the dash. I tried wiring it up, but no go. No static or anything. Not sure yet if it's the speaker or the radio itself. Too bad, but at least the radio light works when I turn it on.

-gw


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1967 Camaro
406/M20 11.94@117
http://www.mindspring.com/~gordon.warren/

Probably the speaker, 30+ years of sunlight and heat/dust take their toll on the paper cone.

To quickly check the speaker without even having to remove it, do this:

Take a 9 volt battery (or any fresh battery like a "D") and some small jumper wires (scap wire you have lying around will do). Find the wires that lead to the speaker, and take one jumper wire and connect it to the (-)terminal on the battery, take the other end of that jumper wire and connect it to the black speaker lead. Take another jumper wire and hook it to the green speaker wire and QUICKLY touch the battery (+), if the speaker has a loud "pop" resulting, the voice coil is still good, meaning the speaker is not "open" and should operate (radio problems). If it doesn't "pop", you've got a bad speaker.

[This message has been edited by Coppertop (edited 01-09-2002).]