[Vwdiesel] temp gage

[Roger Brown]

mikitka wrote:
> I was wondering why my temp gage reads slightly higher when driving at night
> with the lights on. During the hot summer days it runs just barely touching
> the center line on the gage but when I drive into work in the morning or
> coming home in the dark the needle runs straight up on the center line.
> This morning really got me because it was our coldest this year at 45 F/ 7.2
> C and it ran the same slightly higher in temp and I even was running the
> heater inside the car. Could it be due to the difference in the electrical
> voltage due to the draw of the headlights being on putting more of a load on
> the alternator? Or even the extra heat in the dash from the dash lights????
> Just seems odd to have two different readings.

Could be a grounding issue, or from different voltage when the alternator is under load.

-- 
    Roger