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6,103 Posts
Welcome to the forum. The vibration may be the mounts themselves, being better quality than original, more vibration of the engine transferred to the body, thus vibrating the car itself, that is, given there isn't anything wrong with the engine itself, like a burned valve or missing cylinder. Are there any engine codes indicating a problem? As far as the fog light switch goes, that would be a wiring problem associated with a short, or two wires connected through melting usually. I have 2 '02 Cruisers and both of them over time had the issue of the fog lights staying on all the time, which I simply pulled the fuse on both, due to the multi-function switch, a known weak spot in the electrical system. I don't know if the real problem of poor quality plastic (thanks MB), ever got a true quality replacement or not.