Does the stock speaker wire harness go onto the aftermarket one or do i have to strip and solder them to the speaker? or do I have to buy an adapter so it can go on?
strip and solder.
YOu can just pigtail them together if soldering is hard for you, but solder would be the best way.
is there any adapter i can buy so i wouldent have to strip and solder?
most aftermarket speakers come with male spade terminals, so if you bought some female spade terminals and cut the plug off the factory harness and crimped the female connectors on, you could just plug them in.
I don't even cut the plug off, just strip away a little insulation several inches behind the factory plug and splice your wire there. that way you can return it to stock in the future if needed.
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You can also get the plug in harness adapters from crutchfield
I cut about 5 inches of wire off with the harness and then just add wire as needed for the new speakers... then when you sell your car, hooking up the stock speakers isn't too hard.
when i replaced mine i left all the stock crap in there. i was amping them, so the stock harness is all still in the door, nothing cut.
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Injection is nice but id rather be BLOWN!