I recently purchased AutoEnginuity for my laptop. It comes with a USB cable that plugs diectly into the OBDII port of the car for code scanning and live system monitoring. There is a warning on the OBDII end of the cable that says to only use a power inverter with an isolated ground to prevent a ground loop.
I know on an AC system, an isolated ground is connected to the grounding pin only, and runs straight to the panel. I am confused how a 12 volt inverter can have an IG. Do they mean the grounding pin on the 120 side should not be connected to the car's chassis ground? Would it require the inverter to be connected directly to the battery as opposed to the cigar lighter, or power point?
Would it be better just to use a cheater to lift the ground on the 120 side? The PC charger does have a 3 prong cap, but the case is entirely molded plastic.
Sure would appreciate some help understanding this.
I know on an AC system, an isolated ground is connected to the grounding pin only, and runs straight to the panel. I am confused how a 12 volt inverter can have an IG. Do they mean the grounding pin on the 120 side should not be connected to the car's chassis ground? Would it require the inverter to be connected directly to the battery as opposed to the cigar lighter, or power point?
Would it be better just to use a cheater to lift the ground on the 120 side? The PC charger does have a 3 prong cap, but the case is entirely molded plastic.
Sure would appreciate some help understanding this.