I'm not sure if the radio wires in my car are good or not. Is there a way to check, and possibly replace, this yourself? Also, when installing a new radio, do you need 2 different wire harness sets? I have all of the wires in my car, plus I have the car specific wire harness. Do I need a radio specific harness as well?
There's also more than one wire harness set in the car but only one fits the radio?
You should go to Radio Shack and buy a cheap multimeter if you really want to check your car wires. You will measure about 13.5 volts on the power and ignition wire (when car is on). You will measure 0 ohms between ground and the car chassis. You will measure a couple ohms across the speaker wires (+ and - of the same speaker). If you're not sure which wire is which, you should have some wire color codes with the car specific wire harness. Just connect that harness and use it for test points.
The radio specific wire harness is usually provided with the receiver. The best way to do it is to solder the radio specific harness to the car specific harness prior to installation. However, you really don't need the radio specific harness if you have the color codes for the radio. You can just cut the wires coming off the radio and solder the car specific harness directly to it.
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