HK rear door speakers don´t work

Hi friends:
I have done a search but I need very concrete instruction because in car audio (an many other things) I am all ignorant. I don't know where to start: I have HK sound equipment. I fixed the distorted subwoofer, testing channel by channel with balance and fader I checked that
the tweeters sound at a very low volume and the bass doesn't work.
What and how can I do?
Thak you very much for your help!!!!

I have a 2005 Free1 5 doors HSE

Sorry. The failure is in both rear doors.

freespaña said:

What and how can I do?
Thak you very much for your help!!!!

Click to expand...

It's common for the large door speakers to fail completely, or suffer corrosion of the terminals. Most people simply replace the existing speakers with standard 16cm replacements, and drill some screw holes for the new speakers.

Hi. Thaks for your tips. I began to fix. the plug had no continuity and the big speakers connectors didn't show resistance. Applied first anti rust and sand paper to the swich and contacts, then clean and apply clean contacts fluid. The big speaker has now resistance but don't work. Tested the front big speaker in the rear door. Works, it seems that the problem is the speaker like you told me. I applied anti rust fluid to the coil, pressure blow. now the big speaker works!!!! I'll try the same for the tweeter and the speakers of the other door. Thaks for your tips.

Can anyone tell me what or for what is the small plug that I found next to the amplifier plug disconnected? I have heated seats and works fine.

Thanks.

I will appreciate any clarification.

In the other door the speakers from the other site didn´t work and its own speakers works in other door, therefore the problem was in the contacts of the wire. sand paper, anti rust, clean contact fluid and.... perfect. All the system sound like new.
Thanks