Blue Cups

Both of my subs on the right front and rear door are barely working. I took off the trim around the subs so feel the vibrations and I compared them to the right side and it is significantly lower. I switched both the subs from the front doors with each other and the subs work perfectly fine, but the right side is still super quiet, probably 95% quieter. It's probably the wiring but I don't know what to do. please help!

fcm

By sub I assume you mean mid-range speaker.

Have you checked balance and fade controls on your HU?

If you have and both balance and fade are in the middle then pull the stereo and the speakers, [bad side] and with a multimeter check the speaker leads for continuity to chassis ground or each other, short.

If good, [no shorts] switch speakers from the good side to the "bad" side and check the sound, if the problem stays on the bad side, [you have already confirmed speakers are good by testing them on the good side] there is a problem with amplification, [blown amp out put stage] either in the HU onboard amp of if there is an off board amp in it. 94