Check your voltage when it's acting up. Rad fans suck a lot of power, particularly when you've got poor grounding. Many of your issues can be related to a bad battery ground.
Squealing brakes have no impact on any of your electrical system, that's just poorly turned rotors, likely on a semi metallic pad. Par for the course when doing cheap brake work.
Squealing brakes have no impact on any of your electrical system, that's just poorly turned rotors, likely on a semi metallic pad. Par for the course when doing cheap brake work.