Got an oil change other day, and my subwoofer stopped working properly!! did they mess with the ground wire?

i recently had an oil change, and for some reason, my subwoofer stopped working. Im not sure if perhaps when they were under my car, they unhooked my ground wire... has this ever happened to anyone else? The sound is very crackly and not a low boom like it used to.. sometimes it even stops working all together. I dont know if the speaker is gone, but i dont think it is... i play my music loud, and sometimes for long periods of time, but the speaker is of decent quality (DAYTON DVC385-88 15%26quot; DVC SERIES SUBWOOFER) and when i tap on it, it seems fine, and i have always been very careful with it. It is powered by a 980 watt amp.



anyways, i have no idea how to fix it because i had it installed professionally. Where would i look for the ground wire? and if it is lose, than what do i wrap it around??



thanks,Got an oil change other day, and my subwoofer stopped working properly!! did they mess with the ground wire?If you took it to a regular shop or dealer, they probably did mess up your wires, simply so you can go back to have every wire gone through at $60/hour. (They also like to loosen the bolts on the oil pans very slightly so you can bring it back to them to find an oil leak or for a new engine.) The ground wire will be a big black wire and it should be wrapped around a bolt, maybe under a seat.Got an oil change other day, and my subwoofer stopped working properly!! did they mess with the ground wire?The only wat that they could have messed with your grounding wire is if your amp was installed under your hood, which I seriously doubt. If is your ground wire then there would be no sound at all, not some crakling sound. Once your ground wire has a bad connection, it stops the amp from working until that connection is fixed.Got an oil change other day, and my subwoofer stopped working properly!! did they mess with the ground wire?when installing an amplifier you always install the ground wire as short as possible for less resistance, therefore giving you a proper ground, even if you had the system installed somewhere you should know where your amp is, just go the amp look where the black wire is an trace it, however if you do not have a proper ground your amp will not turn on anyway, if you cannot troubleshoot the problem take it back, it could very easily be a loose wire within the sub box, something that simple!