2G high voltage issue

[dsmvenge]

Ive found nothing on my problem first of all. I have a new alternator a new belt new battery. My headlights get brighter and flicker around 2500 rpm and my battery voltage fluctuates from 13.8 to 16 when this is happening. I am lost My wiring is fine. I did relocate the battery to the trunk but with 1/0 gau wire and a 200 amp breaker. Ground issue maybe. I have my battery grounded to the floor pan and my engine grounded to the frame rail. also my oil sensor gauge that isn't even hooked up is pegged all the way up. when it used to be all the way down its not hooked up the wire is taped up and out of the way

 

[tony_tsi]

It sounds like a voltage regulator problem was your Alternator brand-new or used?

 

[dsmvenge]

second brand new one

anyone

 

[brads]

Have you measured voltage underhood, then at the battery to compare. My first thought is that you are right about the grounds, I'd run a big wire, instead of using the body.