I'm seeing a significant voltage drop on the gauge when any accessory or light is on. I can watch the gauge tick up and down with the turn signal and I see a massive drop when the vent fan or headlights are on.
I'm thinking I need to rework the battery cables. I've seen a write-up or a link to one on here before but can't seem to find it now.
Does anyone have input on the best way to upgrade this?