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Discussion Starter #1
I have hooked the ignition cable to the jack comming off the ignition wire at the fuse box. I wondered if I have to run the battery cable to the battery or if it can be run to the fuse box where the power fuse is? Should the radio work in the acc position? I had the radio working except in the acc position so I kept going to different places and now I think I have burn something up. I only get a blank screen and no sound when I turn it on. I just need to know that it is wired right and then figure out if I have done a number on the radio. I am trying to put a AM/FM in a 72 SS. Thanks for any help .
 

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Not positive about everything you said but I'll try. The ign wire from the radio should go to a terminal on the fuse block that has power when the key is turned to on or accessory. The battery wire from the radio should go to a terminal on the fuse block that always has power, this runs the clock and preserves the memory, preset stations. Not sure if your radio will work without the bat wire hooked but you should hook it up to make sure it's not part of the problem. If you can get hold of a multi-meter that's the best way to find the terminals you need. That way you don't risk destroying your radio, although plugging it into the wrong spot should not hurt it. There is nothing in there but 12v and thats what the radio wants.
 

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Discussion Starter #3
Thanks for the infomation. I went back this morning and ran the ign wire back to the jack on the ign wire at the fuse box and ran the battery wire to the power fuse at the box. The radio started working again like before so I guess I did not damage anything. I was getting power at the power fuse with everthing was cut off so I figured this was like hooking to the battery. When I go to the acc position the radio gets no power. There might be another place to run the battery wire so it works in the acc position and has constant power but I sure can"t find it.
 

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Not sure about your 72, check for IGN (hot when key is ON), BAT (always hot) and ACC (hot when key is ON or ACC) terminals on your fuse block. If you have the ACC terminal, hook your switched power from your radio to this terminal rather than IGN.
 

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Either you have a bad fuse, dirty fuse clips, or a bad ignition switch. The ACC terminal, on the fuseblock should have power in both the ACC and ON positions.
 

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Discussion Starter #6
Thanks guys. with your help I finally have the thing wired right and have power when running and in the acc position .
 

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Glad to find this post, as I am putting in new CD player and was wondering about the battery and the ign connectors. Why would the guys at Best Buy tell me not to run the wires to the fuse box?
 

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The 'external' CD changers normally are powered from the radio or "head unit". There is a multi conductor cable that supplies power and ground via a DIN connector. If this is just a combo CD and radio all in one, I would think it would just wire in like a radio.
 
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