1996 Chevy c/k 1500 door speakers

yikes.....   the speaker wiring on that vehicle is floating, not common.... you cant test an AC audio signal with a test light... and the "speaker negative" going to the speaker is an audio return  not a "ground"......

start at the beginning... you had a speaker problem...what kind of speaker problem?  what was it doing or not doing?

Start from the beginning:  I was trying to hook an amp up to my door speakers.  I hooked all the amp wires up(ground power, antenna).  I spliced the speaker wires for my front door speakers at the head unit rear and hooked the wires up to the amp.  After I put in the fuse, I turned on the truck.  My right door speaker blew.  I now am trying to hook up new speakers without the amp and the right door speaker when hooked up makes no sound.  I got out a testlight and tested the lime green wire(positive) and the light lit up as a power wire.  When I have the wires connected to the speakers both speaker wires light up as power wires.  So I put an alternative ground wire from the chasis to the speaker and it played sound.  Only problem was that it sounded very distorted and low in volume.  So this is where my problem dead-ends  and I don't know what to do from this point.

so you have put the radio wiring back the way it was?  it is now stock again?   no speakers wires are now shorted to ground?  when you hooked up the amp did you use a LOC ?   it is certainly possible that you have blown one channel of the factory radio in doing this without one.....

a quick easy test is to pull the radio out (dont unplug it) and using the speaker leads of the new speaker you want to install connect speaker postive and speaker negativeto each channel output right at the back of the radio... does the speaker play fine on all other channels except the right door speaker?  if it does then you blew one channel of the factory HU......