So tested all those location and no fluctuations. The electric does not fluctuate in park, a little at idle in drive an a little at low speeds. Checked all wires and connectors nothing is loose.
Have not checked that. If there is a variance what should the next step be. Side note I am completely self tought on mechanic stuff and absolutely no knowledge electric wise.
So I have a 85 Chevy 4x4 C10. I just recently replaced the headlights and realized I have a fluctuation in them. The battery and alternator check out. What else could it be?