Ok did some more testing. Here is where it gets weird:

Engine ON: 13.95v
Engine ON + A/C: 13.82v
Engine ON + A/C + Radio/Amp/Sub high: 13.70v
Engine ON + A/C + Radio/Amp/Sub High + Lights: 12.65v
Engine ON + A/C + Lights: 12.8v
Engine ON + Lights: 12.89v
Engine ON + Lights + Fogs: 12.80v


I think this issue is to do with the lights....My warning bulb dummy light is on, but I thought that was something separate...maybe it IS in fact related?

Any ideas?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k