I am going to put a switch across a 12v auto battery to interrupt power in case of whatever. Should I break the circuit between the negative terminal and ground or between the positive terminal and the load? Larry L. Ravlin AA7LR EX KØAEY & KD7BXR aa7lr at msn.com<mailto:aa7lr at msn.com> Extra class @ 20WPM FISTS #12867