Took my car here because my check engine light was on and my regulator is out on one of my windows. They said they needed to test the battery. Upon giving me my car back the radio now has this loud static noise coming from it. They said it was doing that because I needed to replace the battery. Now the battery is replaced the radio is still making the noise. They then tried to blame it on it being a aftermarket radio. Now they are trying to say it's a grounding issue, but my car didn't have the noise or an grounding issues before they did whatever they did to battery. Now they are refusing to fix a problem they caused. Had to file a complaint with corporate this morning. Hopefully I can get resolve for this issue, especially since my radio was working fine and had clear sound prior to the touching it!