Did the original ones work before you put in the Pioneer speakers or did they just sound like crap? Just asking because you could have a faulty head unit or amp if you have factory or aftermarket amps. Not sure which system you have. Which speakers did and didn't work before you removed the factory speakers? Get a multimeter and turn on you stereo and select it to volts, stick the contacts on the volt meter into the contacts on the factory wire plug and see if the volt meter bounces to beat of music. If it does, then you have a bad speaker. You don't have to get pos and neg right, it doesn't matter cause this is just a test. If it doesn't, then you have a bad amp, head unit, or break in wiring somewhere.
