Hi, hoping someone can shed some light on a funny situation. Recently I had a stereo system installed in my 67 bird. I bought a CustomSound system which I am happy with. Unfortunately, I noticed I didn't have any directional lights on the way home nor brake lights. I took it to my mechanic who found that they had taken a ground for the stereo from the d lights. My problem is this now that whenever I hit my brakes all the instrumentation on the dash lights up included the aftermarket gauges. I have traced the brake switch wires and they don't seemed to be messed with. the fuse box shows the instrumentation as having its own fuse and circuit so did someone cut into one of the instrument wires and the circuit is getting fed somehow from the brake circuit also? Finally my heater circuit blows the fuse immediately so it also seems to be grounded out also.

I should have installed the stereo myself what a disaster! Any thoughts of how to proceed? Thanks Kevin