[KaileeRebekah4300]

Okay so I'm having problems with what seems to be a ground Issue somewhere in the wiring harness. The car won't lose total power but it loses enough to kick the radio off and both front screens. Doesn't just happen when pulling out (no I'm not pulling the clutch out too far. The car never hops.) but it sometimes happens then but it is also at random. It's not done it going down the interstate or anything at high speed. Also when you roll the windows down you can notice a dimming to the front head lights. How do I fix this? Where are all the grounds located on a 2015 Si?

 

[scottyrocks]

The first thing I would do on any 4 year old car with electrical issues is to have the battery load-tested. Failing batteries can do all sorts of weird things to a car's electronics, and 4 years is considered a point when batteries can begin to fail.

If the battery checks out, then begin looking at other areas.