Quote Originally Posted by Honda View Post
Not sure what the cause is but I do have a few theories:
1. The four wires need to be solder onto the speaker. Because the factory harness did connect two onto one speaker terminal of either (+) or (-)
doubt it, you only need one set of wires to run a speaker
2. The speaker terminal may be touching the metal door but I don't think so.
this is probably your problem
Is there a way to check if the left speaker is generating unwanted signals? Testing the wire with a MM or something? If so, how would I do this?
disconnect speaker cable from amp, set multi meter on lowest resistance setting, put one probe on your ground one on a speaker wire, if you get a reading that's not infinite your gonna have a bad time.

how are the connections made to the speaker? ie did you solder the joins between factory harnes and your speaker wire and properly terminate the end of the wire with spade connectors.