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Old 05-21-2009
preservedkillick preservedkillick is offline
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Temp Sending Unit on Heat Riser - how to test?

I've got a temperature sending plug on the heat rider coming off the back of my Vetus engine with no wire connected to it. I'm trying to figure out which wire connects to the spade connector on the sending unit, not (yet) if the sending unit works. The wire according to the wiring schematics that should connect, is not, but is connected to a plug on the engine pan (the very bottom)?

What I'd like to do is see if I can trigger the high temp alarm using that wire, but I'm not quite understanding how the sending unit works. With just a single wire, I'm assuming the sending unit closes a circuit by grounding the wire lead to the engine block?? If I take the wire and touch it to ground, shouldn't the alarm activate??

Am I close?

-Preserved.
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Seagrass
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