Thanks Extrap, but he's testing a temp sensor, not a temp switch.
My temp switch is out of my 79 Goldwing, but same idea as the SP1's. A sensor to convey temp info to the guage (and ECU), and a seperate temp switch to complete a power source for the fan.
It's the temp switch I'm trying to determine if it's working.
I heated the oil up to 230F.
Then I tested both old and new thermo switch again.
Set to 2K Ohms, and I also tried 200.
As expected, both switches show an open circuit when cold.
But where I'm stumped is that even when put into the hot oil, they both still indicate an open circuit.
I don't know if my old switch is good, but I would expect the new switch to show continuity when dipped into oil that's well above the 220F.
EDIT: According to the Haynes manual, the switch should show continuity once temp hits 208 - 215F degrees.
Going to get a known good temp switch I have in the parts bin and test it. Then I'll try testing these two switches again. If I still get no continuity readings from the new switch, I guess I'll take it back to Honda...
Last edited by jondog9; 05-19-2015 at 06:31 PM.