oil temperature gauge operation?

[Huw Powell]

poor ground for gauges.  My oil temp used to actually peg out when I
used the cig. lighter til I ran a new ground (on the coupe).

"Roa, Greg" wrote:
> 
> Hello all,
> When driving the 86 4kq on longer trips, I've noticed that my oil
> temperature stays at a reasonable reading on the console gauge, except when
> I have my headlights on.  When the headlights are on, often the gauge will
> climb up during the trip.  However, when I turn the headlights off, the
> gauge seems to drop several notches within a few seconds.  The only clue
> that I have is that the voltage gauge often drops from the 13.5v mark to the
> 13v mark when I turn the headlights on.  Not always, but often.  So, could
> this be a bad ground or alternator time, or just a strange coincidence?  I
> would have thought that the oil pressure gauge would read lower if the
> voltage was lower, so it doesn't make much sense to me...  Any clues?
> Thanks,
> 
> Greg Roa
> Cincinnati, OH
> 86' 4kcsq
> 93' 90 CS
> 83' 944

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/