This is a David Beierl question. Whether you add a resistor in series or
in parallel depends on whether the sender is a constant voltage source,
or a constant current source.

Let's all step back, shall we? The David is about to speak...
--
Rocky J Squirrel
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
Bend, OR
KG6RCR

Paul Guzyk wrote:
> My 1.9 style dash coolant temp sender died.
>
> I replaced it with a new one.   Now the gauge reads high, about 65%-70% when normal operating temperature instead of 50% (LED dead center) like the old one.
>
> I'm thinking of adding a resister in series with the new temp sensor to get the needle back in the middle.
>
> Anyone seen this before?
> What value resister/pot did you add?