How good is my battery?

[ForceEdge 10+ year member]

get a hard wired volt meter and wire directly to amp ..thats where u wana see the voltage drop not at the cig lighter

If you wired it just to the amp wont that only show the volts dropping at the amp?

What if i wanted to know how much my amps dropped throughout the car. where would you wire it?

 

[NASTY08IMPALA 5,000+ posts]

wiring at the amp shows overall voltage pretty accurate. i just like wiring atthe amp so i kno exactly whats goin on at the amp, which is the piece of the puzzle thats causing all my cars major voltage spikes