I replaced the factory stereo in my 1989 Pontiac 6000LE, 2.5L-4 cyl. with a new CD reciever, I used a wiring harness to make things easier. The new CD player worked fine. I turned it off and it quit working. No power. I checked the wires and the yellow constant power wire was breached (?). I could see the wire through the insulation. I think the heat sink fins on the back of the reciever cut through the insulation and touched the wire. Now the factory stereo gets power but the display doesn't light up and it won't tune any stations. The tape player also works but there is a wierd beeping that almost sounds like morse code over the tape, but the sound is real crappy. I checked all the fuses in the fuse panel and they are all good. Could there be an inline fuse on the constant power supply somewhere other than in the fuse box? If not, any ideas of what the problem could be?
Please help me I can't drive without the bump.
I'd say test for proper voltage at the harness, first with the unit unplugged. Check your constant and accessory. Check for a good ground as well. Now test with the unit plugged in/turned on. If you had one wire frayed, there's a good possibility that you have others. You may have another that you didn't notice that's shorting somewhere, but not passing enough current to blow a fuse. You might try running new constant and accessory from the ignition harness, and grounding to the vehicle chassis. Then verify all your speaker leads are good.