I installed ISC coilovers and SPC control arms on my 2015 wrx yesterday. When we were working on the rear arms and coils there was a buzzing sound that almost sounded like the fuel pump priming, it was not the fuel pump since the car was off, but it was coming from around the rear diff. The sound continued for about 10 minutes then stopped. The car was on 2 jack stands At the pinch welds on the rear side skirts. Once we finished, I pulled it out of the driveway and as soon as I got over 15 mph the abs, traction control and hill assist light came on. It said VDC, ABS, and hill assist we're disabled. Any idea why this would happen or how to resolve?
I'm going to get an alignment today, right now that's my only guess because it is out of spec.