As I recall, the blinking light has no relation to coolant temperature or resistor selection. When the light blinks, it only means that the two prongs in the coolant reservoir cap are no longer submerged in coolant or the same circuit has otherwise lost continuity.
For the temp reading, a 22 ohm resistor (or 20-30 ohms) is usually about right to put the temp needle in the middle of the arc but still, an overtemp does not make the light blink.
A search on the Samba will explain the blinking light.
-Kent
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On Apr 23, 2012, at 5:25 PM, David Beierl wrote:
At 02:54 PM 4/23/2012, Scott Daniel - Turbovans wrote:
I don't think the reistor method is really right to operate the temp
gauge , seems to me if it's calibrated to be correct at around around
180 degrees ..it might be off at other temps .
To get best use (rather than best aesthetics) from an external
resistor, I'd suggest the value that gives you a total (sender plus
external resistor) of 35 ohms at the temperature that you want the
overheat alarm to go off. That's the calibration value for the
overheat threshold of the Vanagon gauge. I don't know the
characteristics of the Subaru senders, so I can't tell you exactly
what that value is.
The gauge will read differently on the rest of the scale, but it will
be correct at the crucial point.
Yours,
David
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